Max Bruckner bbe22a9055 fix: no brackets with single operators (bug #273)
* Use brackets after unary minus followed by an OperatorNode with + or -
 - "-(a+b)", "-(a-b)"
* Use brackets in fron of postfix operators like '!' (for OperatorNode)
 - "(a*b)!", "(a+b)!"
2015-02-14 02:36:38 +01:00
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