Input:
". . . . ."
Expected output:
". . . . ."
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\swill take all spaces, including new lines, so you may change that to/ {2,}/g.{2,}takes two or more. Unlike\s+, this will not replace a single space with a single space. (a bit of an optimization, but it usually makes a differance)gflag is needed in JavaScript, or it will only change the first block of spaces, and not all of them.