The  m, ... ,x match in the OPed code uses the  /x whitespace/comments modifier; your match does not. (Update: I presume mldvx4 is still using the  /x modifier.)

Give a man a fish:  <%-{-{-{-<

In reply to Re^4: Regex AND NOT with zero-width negative lookahead assertion by AnomalousMonk
in thread Regex AND NOT with zero-width negative lookahead assertion by mldvx4

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