Blame polymake-format.patch

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--- ./lib/core/src/perl/RefHash.xs.orig	2014-10-13 06:14:22.000000000 -0600
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+++ ./lib/core/src/perl/RefHash.xs	2014-11-08 20:00:00.000000000 -0700
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@@ -88,7 +88,7 @@ SV* ref2key(SV *keysv, tmp_keysv *tmp_ke
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    }                                                                    \
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 } STMT_END
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-static char err_ref[]="Reference as a key in a normal hash";
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+static const char err_ref[]="Reference as a key in a normal hash";
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 static inline
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 int ref_key_allowed(HV *class)