[Bug translation/89915] clean up and canonicalize wording in params.def

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89915

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
While I agree that params.def needs some fix ups in their working.  params
should be considered as internal options which only should be used for
debugging and not even documented in the normal documentation.