This regexp prettifies a hex dump in the form:

1234abcd: 12 34 56 78 ab cd ef 00 .4Vx«Íï.
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So that it prints out as:

{Tab}"x12 x34 x56 x78 xab xcd xef x00", {Tab}{Tab}/* 1234abcd: .4Vx«Íï
+ */
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That is, it takes a hex dump and converts it to something that can easily be used to make a C program with appropriate comments.