stringutil: update list of re-special characters to include &~ I missed this because I was looking at the change that refactored re.escape, and these characters were added in https://github.com/python/cpython/commit/05cb728d68a278d11466f9a6c8258d914135c96c. Differential Revision: https://phab.mercurial-scm.org/D3850

# See http://EditorConfig.org for the specification

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