ModelicaLexer: Enhancements and fixes.  * 'Strings' and operator classes ('+') are now matched.  *  removed unneeded and erroneous matches from other languages.
ModelicaLexer: Enhancements and fixes.
 * 'Strings' and operator classes ('+') are now matched.
 *  removed unneeded and erroneous matches from other languages.

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