parser doesn't work with diffs from git merge commits

[ajdlinux]

@mpe reported that https://patchwork.ozlabs.org/patch/1129056/ is missing a patch diff.

It appears this is because it's a diff of a git merge commit:

diff --cc arch/powerpc/include/asm/pgtable.h
index bf7d771f342e,64145751b2fd..000000000000
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@@ -140,30 -140,20 +140,44 @@@ static inline void pte_frag_set(mm_cont
  }
  #endif

as opposed to a normal diff

diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 80ceb458e79c..ef75f590ad3e 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -133,20 +133,27 @@ struct ppc64_stub_entry
  * the stub, but it's significantly shorter to put these values at the
  * end of the stub code, and patch the stub address (32-bits relative

The part that the parser trips on is the unusual format of the @@@ header line because of diff --cc mode.

This isn't too high priority since sending a merge diff to a mailing list is not the normal case, but we might still want to consider fixing the regex to cope with this.