Right now rustdoc replaces the string ".md)" with ".html)" to fix links between
markdown files, so use a different syntax that doesn't get caught in the
crossfire.
Closes#22900
This commit is an attempt to standardize the use of punctuation and
formatting in "The Rust Programming Language" as discussed in #19823.
- Convert bold text to italicized textcwhen referring to terminology.
- Convert single-quoted text to italicized or double-quoted text,
depending on context.
- Use double quotes only in the case of scare quotes or quotations.
