marijnh/CodeMirror — pull request #1808 by JosephPecoraro (2013-09-05 20:56:53+00:00)
Title: Copy CodeMirror.defaults.gutters Array on CodeMirror instance initialization

This prevents unexpectedly sharing an Array between all CodeMirror instances
that don't explicitly specify a gutters array in options.

This would Close #1807

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This is a suggested patch, but there are of course alternative solutions. No need to take my specific patch as is.