patch: don't look for headers in diff lines
If you have a diff line that matches a header line, the patch splitter
currently breaks your patch at this line. For example a line like:
+key: value
This can lead to "malformed patch" exceptions. Now fixed.
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1c590d34bf61e2ea12c71738e5a746cd74586157 0.4e
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23889160905a1b09fffe1c07378e9fc1827606eb 0.9.5
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11efa41037e280d08cfb07c09ad485df30fb0ea8 1.2
02981000012e3adf40c4849bd7b3d5618f9ce82d 1.2.1
196d40e7c885fa6e95f89134809b3ec7bdbca34b 1.3
3ef6c14a1e8e83a31226f5881b7fe6095bbfa6f6 1.3.1
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296a0b14a68621f6990c54fdba0083f6f20935bf 1.4.2
4aa619c4c2c09907034d9824ebb1dd0e878206eb 1.4.3
ff2704a8ded37fbebd8b6eb5ec733731d725da8a 1.5
2b01dab594167bc0dd33331dbaa6dca3dca1b3aa 1.5.1