Documentation: change "&" to "and" in Documentation/applying-patches.txt

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 When patch applies a patch file it attempts to verify the sanity of the

 When patch applies a patch file it attempts to verify the sanity of the

file in different ways.

file in different ways.

Checking that the file looks like a valid patch file & checking the code

Checking that the file looks like a valid patch file and checking the code

around the bits being modified matches the context provided in the patch are

around the bits being modified matches the context provided in the patch are

just two of the basic sanity checks patch does.

just two of the basic sanity checks patch does.