better regex for matching special sequences

[robinkunde]

It's good that the docs suggest lazy matching, but this still requires backtracking.

A better alternative, as documented at http://www.regular-expressions.info/repeat.html, is to use a character class with negation.

[CLAassistant]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}