encoding: add option to escape non-ascii characters in JSON
This is necessary for hgweb to embed JSON data in HTML. JSON data must be
able to be embedded in non-UTF-8 HTML page so long as the page encoding is
compatible with ASCII.
According to RFC 7159, non-BMP character is represented as UTF-16 surrogate
pair. This function first splits an input string into an array of UTF-16
code points.
https://tools.ietf.org/html/rfc7159.html#section-7
Mercurial
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Mercurial is a fast, easy to use, distributed revision control tool
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$ hg debuginstall # sanity-check setup
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See https://mercurial-scm.org/ for detailed installation
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