grep -v exit status constantly zero

[Harri Järvi]

GNU grep manual doesn't clearly state what the exit status will be 
when used with the "-v" (--invert-match) option.

In practice the exit value seems to be 0 (zero) in every case with the
"-v" option.

Some versions of grep manual found on the web seems to clarify the exit
status used in this case. For example:
 "Normally,  exit status is 0 if matches were found, and 1 if no 
  matches were found.  (The -v option inverts the sense  of  the
  exit status.)"
   - http://leaf.dragonflybsd.org/cgi/web-man?section=1&command=grep

I think the manual should say how the -v option affects the exit status.
Also I think the exit status should reflect wether there was a match or
not, and not be constantly zero.

Yours,
Harri