More format extensions tests

[Jeffrey A Law]

  In message <Pine.LNX.4.21.0008250235370.28994-100000@kern.srcf.societies.cam.
ac.uk>you write:
  > This patch disallows format width and flags on the strftime "z" format
  > (glibc doesn't do anything sensible with them), and adds more tests
  > for format checking extensions.  With these testcases, I think that
  > the 2200 lines of format checking testcases are now thorough enough to
  > start reorganising and cleaning up parts of format checking without
  > breaking it.
  > 
  > Bootstrapped with no regressions on i686-pc-linux-gnu.  With this
  > patch applied, all the tests in it pass.  OK to commit?
  > 
  > gcc/ChangeLog:
  > 2000-08-25  Joseph S. Myers  <jsm28@cam.ac.uk>
  > 
  > 	* c-common.c (time_char_table): Don't allow width and flags with
  > 	"z" format.
  > 
  > gcc/testsuite/ChangeLog:
  > 2000-08-25  Joseph S. Myers  <jsm28@cam.ac.uk>
  > 
  > 	* gcc.dg/format-ext-3.c, gcc.dg/format-ext-4.c,
  > 	gcc.dg/format-ext-5.c: New tests.
This is fine.  Please install this patch.

Thanks,
jeff