[PATCH] PR fortran/89103 - Allow blank format items in format strings

[Mark Eggleston]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89103 see comment 4

Please can some one commit the attached patch for me as I do not have 
the privileges to do so.

Change logs:

gcc/fortran

     Jim MacArthur  <jim.macarthur@codethink.co.uk>
     Mark Eggleston  <mark.eggleston@codethink.com>
 Â Â Â  PR fortran/89103
 Â Â Â  * gfortran.texi: Add -fdec-blank-format-item
 Â Â Â  * invoke.texi: Add to section on Commas in FORMAT specifications.
 Â Â Â  * io.c (check_format): At FMT_RPAREN goto finished if
 Â Â Â  -fdec-blank-format-item.
 Â Â Â  * lang.opt: Add new option.
 Â Â Â  * options.c (set_dec_flags): Add SET_BITFLAG for
 Â Â Â  flag_dec_format_defaults.

gcc/testsuite

 Â Â Â  Jim MacArthur <jim.macarthur@codethink.co.uk>
 Â Â Â  Mark Eggleston <mark.eggleston@codethink.com>

 Â Â Â  PR fortran/89103
 Â Â Â  * gfortran.dg/dec_format_empty_item_1.f: New test.
 Â Â Â  * gfortran.dg/dec_format_empty_item_2.f: New test.
 Â Â Â  * gfortran.dg/dec_format_empty_item_3.f: New test.

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