* doc/c-tree.texi: Fix typos and follow spelling conventions.
	* doc/cpp.texi: Likewise.
	* doc/extend.texi: Likewise.
	* doc/gty.texi: Likewise.
	* doc/install.texi: Likewise.
	* doc/invoke.texi: Likewise.
	* doc/md.texi: Likewise.
	* doc/passes.texi: Likewise.
	* doc/rtl.texi: Likewise.
	* doc/sourcebuild.texi: Likewise.
	* doc/tm.texi: Likewise.

From-SVN: r60213