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<?php $regex = '#\d\s-\s\d#'; $string = '66 hello 2.3 - 44 world 99 -8 another dash - but no numbers'; echo preg_replace($regex, '-', $string);
Output for git.master_jit, git.master, rfc.property-hooks
66 hello 2.-4 world 99 -8 another dash - but no numbers

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