Reject end of lines in characters
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Mesabloo commented
At the moment, the lexer allows the following:
'
'which is definetely an error. This is because of how character lexing is handled in the compiler (see https://github.com/nihil-lang/nsc/blob/6b7304210ceb0d583304a860c2dc303bb40e7aa4/lib/nsc-parser/src/Language/NStar/Syntax/Lexer.hs#L157) where MP.anySingle accepts any character. We instead want to reject any end of line character (\n or \r). We could really use MP.satisfy (not . isNewline) instead, this should be a quick fix.
The test https://github.com/nihil-lang/nsc/blob/develop/test/error_lx_eolChar.nst should pass when it is fixed.