renatahodovan / grammarinator / 6345331836

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Improve the handling of the `dot` wildcard in parser rules (#134)

Until now, the `dot` wildcard was handled the same way both in lexer
and parser rules: it meant the generation of a single character.
But it was wrong. From now, if `dot` is placed in a parser rule,
it triggers the generation of a random token, as expected by ANTLR.
The only limitation is that lexer modes are not taken into account
(for now), since it would cause remarkable complication.

13 of 13 new or added lines in 1 file covered. (100.0%)

1240 of 1402 relevant lines covered (88.45%)

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