calculator: use Unicode strings instead of single chars for operators
authorAlexis Laferrière <alexis.laf@xymus.net>
Sun, 1 May 2016 19:10:44 +0000 (15:10 -0400)
committerAlexis Laferrière <alexis.laf@xymus.net>
Wed, 11 May 2016 17:58:06 +0000 (13:58 -0400)
Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>


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