CMake Nightly Date Stamp
ExternalProject: Format module documentation

Manually revise the .rst format of the documentation.  Use inline
literal quotes appropriately in paragraph text.  Move the :: literal
block openers to the end of the preceding paragraphs.  Convert the
command signature documentation and examples to cmake code-block
directives.
Merge topic 'doc-ExternalProject-formatting' into next

01ecd24 ExternalProject: Format module documentation
4bb41b3 CMake Nightly Date Stamp