Escaped square brackets not allowed in formatted error messages
InSubmitted by Peter Mosses on 21 March 2017 at 16:42
| error $[TEXT]square brackets in
TEXTgive parse errors, also when escaped
\[. As alternative grouping characters are not supported, there appears to be no way to format error messages that should include
Square brackets can now be escaped in the text. Use
\\to get a backslash.
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