ART: Formatting and comments in BooleanSimplifier

Change-Id: I9a5aa3f2aa8b0a29d7b0f1e5e247397cf8e9e379
diff --git a/compiler/optimizing/boolean_simplifier.h b/compiler/optimizing/boolean_simplifier.h
index 9fa9c5a..a88733e 100644
--- a/compiler/optimizing/boolean_simplifier.h
+++ b/compiler/optimizing/boolean_simplifier.h
@@ -15,7 +15,7 @@
  */
 
 // This optimization recognizes a common pattern where a boolean value is
-// either casted to an integer or negated by selecting from zero/one integer
+// either cast to an integer or negated by selecting from zero/one integer
 // constants with an If statement. Because boolean values are internally
 // represented as zero/one, we can safely replace the pattern with a suitable
 // condition instruction.