Correction to documentation reader

Python Path class does not retain suffix when using with_name.

app.py

@@ -171,17 +171,33 @@ def cplot(df, ci=0.95):
 
     return _plot
 
+#
+#
+#
+class DocumentationReader:
+    _suffix = '.md'
+
+    def __init__(self, root):
+        self.root = root
+
+    def __getitem__(self, item):
+        return (self
+                .root
+                .joinpath(item)
+                .with_suffix(self._suffix)
+                .read_text())
+
 #
 #
 #
 with gr.Blocks() as demo:
     df = load('jerome-white/alpaca-bt-stan')
-    docs = Path('docs', ' ').with_suffix('.md')
+    docs = DocumentationReader('docs')
 
     gr.Markdown('# Alpaca Bradley–Terry')
     with gr.Row():
         with gr.Column():
-            gr.Markdown(docs.with_name('readme').read_text())
+            gr.Markdown(docs['readme'])
 
         with gr.Column():
             plotter = RankPlotter(df)
@@ -224,6 +240,6 @@ with gr.Blocks() as demo:
                 button.click(cplot(df), inputs=inputs, outputs=[display])
 
     with gr.Accordion('Disclaimer', open=False):
-        gr.Markdown(docs.with_name('disclaimer').read_text())
+        gr.Markdown(docs['disclaimer'])
 
 demo.launch()