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README.md

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-Oberon -> ARMv{6,7E}-M compiler ([BlackBox](http://www.oberon.ch/blackbox.html) subsystem), based on N. Wirth [Project Oberon](http://www.inf.ethz.ch/personal/wirth/ProjectOberon/index.html) Oberon -> RISC compiler
+Oberon → ARMv{6,7E}-M compiler ([BlackBox](http://www.oberon.ch/blackbox.html) subsystem), based on N. Wirth [Project Oberon](http://www.inf.ethz.ch/personal/wirth/ProjectOberon/index.html) Oberon → RISC compiler
 
 Alexander V. Shiryaev, 2014