Improvements to documentation.

Improvements to documentation.

Specifically reducing many of the overful box errors which occur
when generating the pdf documentation.  Also correcting the
manual scaffold link examples now that the compiler uses a
different scaffold naming scheme.

2022-05-13   Gaius Mulley   <gaius.mulley@southwales.ac.uk>

gcc/ChangeLog:

	* doc/gm2.texi: Tidied up many overful lines and corrected
	scaffold link examples.  Updated dates.

gcc/m2/ChangeLog:

	* gm2-compiler/ppg.mod: Reduced the line wrap marker
	to ensure texi pretty print rules do not cause overful box errors
	in gm2 pdf documentation.
	* gm2-libs-iso/SYSTEM.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/Assertion.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/Builtins.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/Builtins.mod: Name change n to nbytes for memcpy,
	memset and memmove.
	* gm2-libs/DynamicStrings.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/Environment.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/FIO.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/FIO.mod: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/FormatStrings.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/FpuIO.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/GetOpt.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.
	* gm2-libs/SYSTEM.def: Shorten the comment lines
	and parameter lists per line to avoid overful box errors.

Signed-off-by: Gaius Mulley <gaius.mulley@southwales.ac.uk>