bug#23185: GNU grep matching discrepancy between -a/--text and not.

[Shlomi Fish]

Hi all,

as can be seen in this repository:

https://github.com/shlomif/gnu-grep-trailing-space-and-CR-on-riddles.he-false-match

GNU grep says a document it suspects to be binary matches without -a/--text and
doesn't match it or return results with that flag applied. perl sides with the
latter.

I'm on Mageia linux x86-64 v6 and have built GNU grep from the latest git
commit ( c767ed70eca9a82d76f07dcdbcaafa21ec7f86d6 ) to test.

Regards,

        Shlomi Fish

P.S: it seems the build system uses gperf but configure does not verify that it
exists in the path.

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