Merge pull request #10 from philipphenkel/fix-typo

Fix typo in documentation

inc/MicroBit.h

@@ -234,7 +234,7 @@ class MicroBit
       * than the hardware random number generator built int the processor, which takes
       * a long time and uses a lot of energy.
       *
-      * KIDS: You shouldn't use this is the real world to generate cryptographic keys though...
+      * KIDS: You shouldn't use this in the real world to generate cryptographic keys though...
       * have a think why not. :-)
       *
       * @param max the upper range to generate a number for. This number cannot be negative.