gcc/ChangeLog: * doc/cppopts.texi: Use "side effect" instead of side-effect. * doc/extend.texi: Same. * doc/generic.texi: Same. * doc/implement-c.texi: Same. * doc/invoke.texi: Same. * doc/md.texi: Same. * doc/rtl.texi: Same. * doc/tree-ssa.texi: Same. From-SVN: r259287