* doc/c-tree.texi: Use `@.' where appropriate.
* doc/extend.texi: Likewise.
* doc/install.texi: Likewise.
* doc/invoke.texi: Likewise.
* doc/loop.texi: Likewise.
* doc/makefile.texi: Likewise.
* doc/md.texi: Likewise.
* doc/passes.texi: Likewise.
* doc/standards.texi: Likewise.
* doc/tm.texi: Likewise.

From-SVN: r132361