regcomp.c: White-space only; no code changes

This outdents a block to the proper alignment, and reflows the comments
perlunicode: Correct false statement

This text is just plain wrong.  It mixes up which is the block property
and which is the script
perlunicode: Refactor verbatim lines into =item ones

This is so that they are able to contain links; both versions render
uglily in different ways.
embed.fnc: Properly declare fcn inline

This function is specified as inline in the source code, but not in the
prototypes; only one compiler seems to have noticed.
ext/XS-APItest: Remove unused variable decl.

This is to stop a compiler warning
pp_ctl.c: Silence compiler warning.

A compiler on one of our smoke platforms wants empty braces here.
regcomp.c: Silence compiler warning

One compiler doesn't like this, so cast to bool
regcomp.c: Comments only, white-space ; no code changes
regcomp.c: Silence compiler warning by using a cast
regcomp.c: Silence compiler warning

One of our smoke compilers is not smart enough to know that the
remainder when dividing by two can only be a 0 or a 1.