support the -C preprocessor mode, which passes comments through, and is
used by the diagnostic checker to identifier expect-error annotations.</li>
<li>The lexer can be in ParsingFilename mode, which happens when preprocessing
- after reading a #include directive. This mode changes the parsing of '<'
+ after reading a #include directive. This mode changes the parsing of '<'
to return an "angled string" instead of a bunch of tokens for each thing
within the filename.</li>
<li>When parsing a preprocessor directive (after "<tt>#</tt>") the