Repository: apple/swift-argument-parser (swift)

Issue:
generate-docc-reference: use term lists for arguments
term lists in docc provide a better UX for argument names

Pull request description:
- added a Boolean to distinguish regular (GH-flavored) markdown from docc-flavored markdown
- represent the arguments in generated files with term lists for the docc-flavored variant
- updated the snapshot tests to work both GH and DocC flavored markdown generation
- removed an added "\n" in the recording of content for snapshot tests, which caused the snapshot tests some issues (recorded tests with new values wouldn't pass on second-run)

resolves #721 

### Checklist
- [X] I've added at least one test that validates that my change is working, if appropriate
- [X] I've followed the code style of the rest of the project
- [X] I've read the [Contribution Guidelines](https://github.com/apple/swift-argument-parser/blob/main/CONTRIBUTING.md)
- [X] I've updated the documentation if necessary

Patch:
diff --git a/Tools/generate-docc-reference/Extensions/ArgumentParser+Markdown.swift b/Tools/generate-docc-reference/Extensions/ArgumentParser+Markdown.swift
index 05e187061..6ec7850aa 100644
--- a/Tools/generate-docc-reference/Extensions/ArgumentParser+Markdown.swift
+++ b/Tools/generate-docc-reference/Extensions/ArgumentParser+Markdown.swift
@@ -34,7 +34,15 @@ extension CommandInfoV0 {
 }
 
 extension CommandInfoV0 {
-  func toMarkdown(_ path: [String]) -> String {
+  /// Recursively parses a command to generate markdown content that describes the command.
+  /// - Parameters:
+  ///   - path: The path of subcommands from the root command.
+  ///   - markdownStyle: The flavor of markdown to emit, either `docc` or `github`
+  /// - Returns: A multi-line markdown file that describes the command.
+  ///
+  /// If `path` is empty, it represents a top-level command.
+  /// Otherwise it's a subcommand, potentially recursive to multiple levels.
+  func toMarkdown(_ path: [String], markdownStyle: OutputStyle) -> String {
     var result =
       String(repeating: "#", count: path.count + 1)
       + " \(self.doccReferenceTitle)\n\n"
@@ -64,7 +72,13 @@ extension CommandInfoV0 {
           continue
         }
 
-        result += "**\(arg.identity()):**\n\n"
+        switch markdownStyle {
+        case .docc:
+          result += "- term **\(arg.identity()):**\n\n"
+        case .github:
+          result += "**\(arg.identity()):**\n\n"
+        }
+
         if let abstract = arg.abstract {
           result += "*\(abstract)*\n\n"
         }
@@ -76,7 +90,9 @@ extension CommandInfoV0 {
     }
 
     for subcommand in self.subcommands ?? [] {
-      result += subcommand.toMarkdown(path + [self.commandName]) + "\n\n"
+      result +=
+        subcommand.toMarkdown(
+          path + [self.commandName], markdownStyle: markdownStyle) + "\n\n"
     }
 
     return result
@@ -92,6 +108,9 @@ extension CommandInfoV0 {
 }
 
 extension ArgumentInfoV0 {
+  /// Returns a string that describes the use of the argument.
+  ///
+  /// If `shouldDisplay` is `false`, an empty string is returned.
   public func usage() -> String {
     guard self.shouldDisplay else {
       return ""
diff --git a/Tools/generate-docc-reference/GenerateDoccReference.swift b/Tools/generate-docc-reference/GenerateDoccReference.swift
index c5f1c6a0e..922ded496 100644
--- a/Tools/generate-docc-reference/GenerateDoccReference.swift
+++ b/Tools/generate-docc-reference/GenerateDoccReference.swift
@@ -36,6 +36,14 @@ extension GenerateDoccReferenceError: CustomStringConvertible {
   }
 }
 
+/// The flavor of generated markdown to emit.
+enum OutputStyle: String, EnumerableFlag, ExpressibleByArgument {
+  /// DocC-supported markdown
+  case docc
+  /// GitHub-flavored markdown
+  case github
+}
+
 @main
 struct GenerateDoccReference: ParsableCommand {
   static let configuration = CommandConfiguration(
@@ -50,6 +58,11 @@ struct GenerateDoccReference: ParsableCommand {
     help: "Directory to save generated docc reference. Use '-' for stdout.")
   var outputDirectory: String
 
+  @Option(
+    name: .shortAndLong,
+    help: "Use docc flavored markdown for the generated output.")
+  var style: OutputStyle = .github
+
   func validate() throws {
     if outputDirectory != "-" {
       // outputDirectory must already exist, `GenerateDoccReference` will not create it.
@@ -71,6 +84,8 @@ struct GenerateDoccReference: ParsableCommand {
 
   func run() throws {
     let data: Data
+    // runs the tool with the --experimental-dump-help argument to capture
+    // the output.
     do {
       let tool = URL(fileURLWithPath: tool)
       let output = try executeCommand(
@@ -80,9 +95,12 @@ struct GenerateDoccReference: ParsableCommand {
       throw GenerateDoccReferenceError.failedToRunSubprocess(error: error)
     }
 
+    // ToolInfoHeader is intentionally kept internal to argument parser to
+    // allow the library some flexibility to update/change its content/format.
     do {
       let toolInfoThin = try JSONDecoder().decode(
         ToolInfoHeader.self, from: data)
+      // verify the serialization version is known/expected
       guard toolInfoThin.serializationVersion == 0 else {
         throw GenerateDoccReferenceError.unsupportedDumpHelpVersion(
           expected: 0,
@@ -101,11 +119,13 @@ struct GenerateDoccReference: ParsableCommand {
 
     do {
       if self.outputDirectory == "-" {
-        try self.generatePages(from: toolInfo.command, savingTo: nil)
+        try self.generatePages(
+          from: toolInfo.command, savingTo: nil, flavor: style)
       } else {
         try self.generatePages(
           from: toolInfo.command,
-          savingTo: URL(fileURLWithPath: outputDirectory))
+          savingTo: URL(fileURLWithPath: outputDirectory),
+          flavor: style)
       }
     } catch {
       throw GenerateDoccReferenceError.failedToGenerateDoccReference(
@@ -113,10 +133,18 @@ struct GenerateDoccReference: ParsableCommand {
     }
   }
 
-  func generatePages(from command: CommandInfoV0, savingTo directory: URL?)
+  /// Generates a markdown file from the CommandInfoV0 object you provide.
+  /// - Parameters:
+  ///   - command: The command to parse into a markdown output.
+  ///   - directory: The directory to save the generated markdown file, printing it if `nil`.
+  ///   - flavor: The flavor of markdown to use when generating the content.
+  /// - Throws: An error if the markdown file cannot be generated or saved.
+  func generatePages(
+    from command: CommandInfoV0, savingTo directory: URL?, flavor: OutputStyle
+  )
     throws
   {
-    let page = command.toMarkdown([])
+    let page = command.toMarkdown([], markdownStyle: style)
 
     if let directory = directory {
       let fileName = command.doccReferenceFileName
diff --git a/Tools/generate-manual/GenerateManual.swift b/Tools/generate-manual/GenerateManual.swift
index 0b42af303..00b8f60d0 100644
--- a/Tools/generate-manual/GenerateManual.swift
+++ b/Tools/generate-manual/GenerateManual.swift
@@ -92,6 +92,8 @@ struct GenerateManual: ParsableCommand {
 
   func run() throws {
     let data: Data
+    // runs the tool with the --experimental-dump-help argument to capture
+    // the output.
     do {
       let tool = URL(fileURLWithPath: tool)
       let output = try executeCommand(
@@ -101,9 +103,12 @@ struct GenerateManual: ParsableCommand {
       throw GenerateManualError.failedToRunSubprocess(error: error)
     }
 
+    // ToolInfoHeader is intentionally kept internal to argument parser to
+    // allow the library some flexibility to update/change its content/format.
     do {
       let toolInfoThin = try JSONDecoder().decode(
         ToolInfoHeader.self, from: data)
+      // verify the serialization version is known/expected
       guard toolInfoThin.serializationVersion == 0 else {
         throw GenerateManualError.unsupportedDumpHelpVersion(
           expected: 0,


Test patch:
diff --git a/Sources/ArgumentParserTestHelpers/TestHelpers.swift b/Sources/ArgumentParserTestHelpers/TestHelpers.swift
index c2b8bb4e6..a71e324f8 100644
--- a/Sources/ArgumentParserTestHelpers/TestHelpers.swift
+++ b/Sources/ArgumentParserTestHelpers/TestHelpers.swift
@@ -448,7 +448,7 @@ extension XCTest {
       ProcessInfo.processInfo.environment["RECORD_SNAPSHOTS"] != nil
 
     if record || recordEnvironment || !snapshotExists {
-      let recordedValue = actual + "\n"
+      let recordedValue = actual
       try FileManager.default.createDirectory(
         at: snapshotDirectoryURL,
         withIntermediateDirectories: true,
@@ -507,8 +507,9 @@ extension XCTest {
       line: line)
   }
 
-  public func assertGenerateDoccReference(
+  public func assertGeneratedReference(
     command: String,
+    doccFlavored: Bool,
     record: Bool = false,
     test: StaticString = #function,
     file: StaticString = #filePath,
@@ -519,10 +520,19 @@ extension XCTest {
     #endif
 
     let commandURL = debugURL.appendingPathComponent(command)
-    let command = [
-      "generate-docc-reference", commandURL.path,
-      "--output-directory", "-",
-    ]
+    let command: [String]
+    if doccFlavored {
+      command = [
+        "generate-docc-reference", commandURL.path,
+        "--output-directory", "-",
+        "--style", "docc",
+      ]
+    } else {
+      command = [
+        "generate-docc-reference", commandURL.path,
+        "--output-directory", "-",
+      ]
+    }
     let actual = try AssertExecuteCommand(
       command: command,
       file: file,
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/GenerateDoccReferenceTests.swift b/Tests/ArgumentParserGenerateDoccReferenceTests/GenerateDoccReferenceTests.swift
index 599ee86cd..a976f26da 100644
--- a/Tests/ArgumentParserGenerateDoccReferenceTests/GenerateDoccReferenceTests.swift
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/GenerateDoccReferenceTests.swift
@@ -14,25 +14,42 @@ import XCTest
 
 final class GenerateDoccReferenceTests: XCTestCase {
   #if os(macOS)
+  func testCountLinesMarkdownReference() throws {
+    guard #available(macOS 12, *) else { return }
+    try assertGeneratedReference(command: "count-lines", doccFlavored: false)
+  }
+
   func testCountLinesDoccReference() throws {
     guard #available(macOS 12, *) else { return }
-    try assertGenerateDoccReference(command: "count-lines")
+    try assertGeneratedReference(command: "count-lines", doccFlavored: true)
   }
   #endif
 
+  func testColorMarkdownReference() throws {
+    try assertGeneratedReference(command: "color", doccFlavored: false)
+  }
   func testColorDoccReference() throws {
-    try assertGenerateDoccReference(command: "color")
+    try assertGeneratedReference(command: "color", doccFlavored: true)
   }
 
+  func testMathMarkdownReference() throws {
+    try assertGeneratedReference(command: "math", doccFlavored: false)
+  }
   func testMathDoccReference() throws {
-    try assertGenerateDoccReference(command: "math")
+    try assertGeneratedReference(command: "math", doccFlavored: true)
   }
 
+  func testRepeatMarkdownReference() throws {
+    try assertGeneratedReference(command: "repeat", doccFlavored: false)
+  }
   func testRepeatDoccReference() throws {
-    try assertGenerateDoccReference(command: "repeat")
+    try assertGeneratedReference(command: "repeat", doccFlavored: true)
   }
 
+  func testRollMarkdownReference() throws {
+    try assertGeneratedReference(command: "roll", doccFlavored: false)
+  }
   func testRollDoccReference() throws {
-    try assertGenerateDoccReference(command: "roll")
+    try assertGeneratedReference(command: "roll", doccFlavored: true)
   }
 }
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorDoccReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorDoccReference().md
index 966fd9cdd..ccdb71eb2 100644
--- a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorDoccReference().md
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorDoccReference().md
@@ -6,19 +6,19 @@
 color --fav=<fav> [--second=<second>] [--help]
 ```
 
-**--fav=\<fav\>:**
+- term **--fav=\<fav\>:**
 
 *Your favorite color.*
 
 
-**--second=\<second\>:**
+- term **--second=\<second\>:**
 
 *Your second favorite color.*
 
 This is optional.
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -31,7 +31,7 @@ Show subcommand help information.
 color help [<subcommands>...] 
 ```
 
-**subcommands:**
+- term **subcommands:**
 
 
 
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorMarkdownReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorMarkdownReference().md
new file mode 100644
index 000000000..966fd9cdd
--- /dev/null
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testColorMarkdownReference().md
@@ -0,0 +1,39 @@
+# color
+
+<!-- Generated by swift-argument-parser -->
+
+```
+color --fav=<fav> [--second=<second>] [--help]
+```
+
+**--fav=\<fav\>:**
+
+*Your favorite color.*
+
+
+**--second=\<second\>:**
+
+*Your second favorite color.*
+
+This is optional.
+
+
+**--help:**
+
+*Show help information.*
+
+
+## color.help
+
+Show subcommand help information.
+
+```
+color help [<subcommands>...] 
+```
+
+**subcommands:**
+
+
+
+
+
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesDoccReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesDoccReference().md
index 88b97b538..ca99aa54b 100644
--- a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesDoccReference().md
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesDoccReference().md
@@ -6,22 +6,22 @@
 count-lines [<input-file>] [--prefix=<prefix>] [--verbose] [--help]
 ```
 
-**input-file:**
+- term **input-file:**
 
 *A file to count lines in. If omitted, counts the lines of stdin.*
 
 
-**--prefix=\<prefix\>:**
+- term **--prefix=\<prefix\>:**
 
 *Only count lines with this prefix.*
 
 
-**--verbose:**
+- term **--verbose:**
 
 *Include extra information in the output.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -34,7 +34,7 @@ Show subcommand help information.
 count-lines help [<subcommands>...] 
 ```
 
-**subcommands:**
+- term **subcommands:**
 
 
 
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesMarkdownReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesMarkdownReference().md
new file mode 100644
index 000000000..88b97b538
--- /dev/null
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testCountLinesMarkdownReference().md
@@ -0,0 +1,42 @@
+# count-lines
+
+<!-- Generated by swift-argument-parser -->
+
+```
+count-lines [<input-file>] [--prefix=<prefix>] [--verbose] [--help]
+```
+
+**input-file:**
+
+*A file to count lines in. If omitted, counts the lines of stdin.*
+
+
+**--prefix=\<prefix\>:**
+
+*Only count lines with this prefix.*
+
+
+**--verbose:**
+
+*Include extra information in the output.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+## count-lines.help
+
+Show subcommand help information.
+
+```
+count-lines help [<subcommands>...] 
+```
+
+**subcommands:**
+
+
+
+
+
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathDoccReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathDoccReference().md
index adcaac132..f7d37d8fa 100644
--- a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathDoccReference().md
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathDoccReference().md
@@ -8,12 +8,12 @@ A utility for performing maths.
 math [--version] [--help]
 ```
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -26,22 +26,22 @@ Print the sum of the values.
 math add [--hex-output] [<values>...] [--version] [--help]
 ```
 
-**--hex-output:**
+- term **--hex-output:**
 
 *Use hexadecimal notation for the result.*
 
 
-**values:**
+- term **values:**
 
 *A group of integers to operate on.*
 
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -56,22 +56,22 @@ Print the product of the values.
 math multiply [--hex-output] [<values>...] [--version] [--help]
 ```
 
-**--hex-output:**
+- term **--hex-output:**
 
 *Use hexadecimal notation for the result.*
 
 
-**values:**
+- term **values:**
 
 *A group of integers to operate on.*
 
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -86,12 +86,12 @@ Calculate descriptive statistics.
 math stats [--version] [--help]
 ```
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -104,22 +104,22 @@ Print the average of the values.
 math stats average [--kind=<kind>] [<values>...] [--version] [--help]
 ```
 
-**--kind=\<kind\>:**
+- term **--kind=\<kind\>:**
 
 *The kind of average to provide.*
 
 
-**values:**
+- term **values:**
 
 *A group of floating-point values to operate on.*
 
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -134,17 +134,17 @@ Print the standard deviation of the values.
 math stats stdev [<values>...] [--version] [--help]
 ```
 
-**values:**
+- term **values:**
 
 *A group of floating-point values to operate on.*
 
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -159,35 +159,35 @@ Print the quantiles of the values (TBD).
 math stats quantiles [<one-of-four>] [<custom-arg>] [<values>...]     [--file=<file>] [--directory=<directory>] [--shell=<shell>] [--custom=<custom>] [--version] [--help]
 ```
 
-**one-of-four:**
+- term **one-of-four:**
 
 
-**custom-arg:**
+- term **custom-arg:**
 
 
-**values:**
+- term **values:**
 
 *A group of floating-point values to operate on.*
 
 
-**--file=\<file\>:**
+- term **--file=\<file\>:**
 
 
-**--directory=\<directory\>:**
+- term **--directory=\<directory\>:**
 
 
-**--shell=\<shell\>:**
+- term **--shell=\<shell\>:**
 
 
-**--custom=\<custom\>:**
+- term **--custom=\<custom\>:**
 
 
-**--version:**
+- term **--version:**
 
 *Show the version.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -204,7 +204,7 @@ Show subcommand help information.
 math help [<subcommands>...] 
 ```
 
-**subcommands:**
+- term **subcommands:**
 
 
 
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathMarkdownReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathMarkdownReference().md
new file mode 100644
index 000000000..adcaac132
--- /dev/null
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testMathMarkdownReference().md
@@ -0,0 +1,212 @@
+# math
+
+<!-- Generated by swift-argument-parser -->
+
+A utility for performing maths.
+
+```
+math [--version] [--help]
+```
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+## math.add
+
+Print the sum of the values.
+
+```
+math add [--hex-output] [<values>...] [--version] [--help]
+```
+
+**--hex-output:**
+
+*Use hexadecimal notation for the result.*
+
+
+**values:**
+
+*A group of integers to operate on.*
+
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+
+
+## math.multiply
+
+Print the product of the values.
+
+```
+math multiply [--hex-output] [<values>...] [--version] [--help]
+```
+
+**--hex-output:**
+
+*Use hexadecimal notation for the result.*
+
+
+**values:**
+
+*A group of integers to operate on.*
+
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+
+
+## math.stats
+
+Calculate descriptive statistics.
+
+```
+math stats [--version] [--help]
+```
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+### math.stats.average
+
+Print the average of the values.
+
+```
+math stats average [--kind=<kind>] [<values>...] [--version] [--help]
+```
+
+**--kind=\<kind\>:**
+
+*The kind of average to provide.*
+
+
+**values:**
+
+*A group of floating-point values to operate on.*
+
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+
+
+### math.stats.stdev
+
+Print the standard deviation of the values.
+
+```
+math stats stdev [<values>...] [--version] [--help]
+```
+
+**values:**
+
+*A group of floating-point values to operate on.*
+
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+
+
+### math.stats.quantiles
+
+Print the quantiles of the values (TBD).
+
+```
+math stats quantiles [<one-of-four>] [<custom-arg>] [<values>...]     [--file=<file>] [--directory=<directory>] [--shell=<shell>] [--custom=<custom>] [--version] [--help]
+```
+
+**one-of-four:**
+
+
+**custom-arg:**
+
+
+**values:**
+
+*A group of floating-point values to operate on.*
+
+
+**--file=\<file\>:**
+
+
+**--directory=\<directory\>:**
+
+
+**--shell=\<shell\>:**
+
+
+**--custom=\<custom\>:**
+
+
+**--version:**
+
+*Show the version.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+
+
+
+
+## math.help
+
+Show subcommand help information.
+
+```
+math help [<subcommands>...] 
+```
+
+**subcommands:**
+
+
+
+
+
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatDoccReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatDoccReference().md
index 8d0714b48..a7ec2089d 100644
--- a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatDoccReference().md
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatDoccReference().md
@@ -6,22 +6,22 @@
 repeat [--count=<count>] [--include-counter] <phrase> [--help]
 ```
 
-**--count=\<count\>:**
+- term **--count=\<count\>:**
 
 *The number of times to repeat 'phrase'.*
 
 
-**--include-counter:**
+- term **--include-counter:**
 
 *Include a counter with each repetition.*
 
 
-**phrase:**
+- term **phrase:**
 
 *The phrase to repeat.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -34,7 +34,7 @@ Show subcommand help information.
 repeat help [<subcommands>...] 
 ```
 
-**subcommands:**
+- term **subcommands:**
 
 
 
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatMarkdownReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatMarkdownReference().md
new file mode 100644
index 000000000..8d0714b48
--- /dev/null
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRepeatMarkdownReference().md
@@ -0,0 +1,42 @@
+# repeat
+
+<!-- Generated by swift-argument-parser -->
+
+```
+repeat [--count=<count>] [--include-counter] <phrase> [--help]
+```
+
+**--count=\<count\>:**
+
+*The number of times to repeat 'phrase'.*
+
+
+**--include-counter:**
+
+*Include a counter with each repetition.*
+
+
+**phrase:**
+
+*The phrase to repeat.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+## repeat.help
+
+Show subcommand help information.
+
+```
+repeat help [<subcommands>...] 
+```
+
+**subcommands:**
+
+
+
+
+
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollDoccReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollDoccReference().md
index d84e3e2b0..03a66a718 100644
--- a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollDoccReference().md
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollDoccReference().md
@@ -6,29 +6,29 @@
 roll [--times=<n>] [--sides=<m>] [--seed=<seed>] [--verbose] [--help]
 ```
 
-**--times=\<n\>:**
+- term **--times=\<n\>:**
 
 *Rolls the dice <n> times.*
 
 
-**--sides=\<m\>:**
+- term **--sides=\<m\>:**
 
 *Rolls an <m>-sided dice.*
 
 Use this option to override the default value of a six-sided die.
 
 
-**--seed=\<seed\>:**
+- term **--seed=\<seed\>:**
 
 *A seed to use for repeatable random generation.*
 
 
-**--verbose:**
+- term **--verbose:**
 
 *Show all roll results.*
 
 
-**--help:**
+- term **--help:**
 
 *Show help information.*
 
@@ -41,7 +41,7 @@ Show subcommand help information.
 roll help [<subcommands>...] 
 ```
 
-**subcommands:**
+- term **subcommands:**
 
 
 
diff --git a/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollMarkdownReference().md b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollMarkdownReference().md
new file mode 100644
index 000000000..d84e3e2b0
--- /dev/null
+++ b/Tests/ArgumentParserGenerateDoccReferenceTests/Snapshots/testRollMarkdownReference().md
@@ -0,0 +1,49 @@
+# roll
+
+<!-- Generated by swift-argument-parser -->
+
+```
+roll [--times=<n>] [--sides=<m>] [--seed=<seed>] [--verbose] [--help]
+```
+
+**--times=\<n\>:**
+
+*Rolls the dice <n> times.*
+
+
+**--sides=\<m\>:**
+
+*Rolls an <m>-sided dice.*
+
+Use this option to override the default value of a six-sided die.
+
+
+**--seed=\<seed\>:**
+
+*A seed to use for repeatable random generation.*
+
+
+**--verbose:**
+
+*Show all roll results.*
+
+
+**--help:**
+
+*Show help information.*
+
+
+## roll.help
+
+Show subcommand help information.
+
+```
+roll help [<subcommands>...] 
+```
+
+**subcommands:**
+
+
+
+
+