[PATCH] Clear --help=language and --help=common interaction.

[Martin Liška]

Hi.

For situations like -Q --help=warning,c one can't see a warning
that is common. For that one needs to use -Q --help=warning,common.
My patch explains the behavior in documentation.

Ready to be installed?
Thanks,
Martin

gcc/ChangeLog:

2020-03-02  Martin Liska  <mliska@suse.cz>

	PR c/93886
	PR c/93887
	* doc/invoke.texi: Clarify --help=language and --help=common
	interaction.
---
  gcc/doc/invoke.texi | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)


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