* doc/c-tree.texi, doc/cfg.texi, doc/extend.texi, doc/gty.texi,
	doc/install.texi, doc/invoke.texi, doc/md.texi, doc/passes.texi,
	doc/rtl.texi, doc/tm.texi, doc/tree-ssa.texi: Remove trailing
	whitespace.

From-SVN: r90100