Fix cpplint whitespace/newline issues

Change-Id: Ie2049d9f667339e41f36c4f5d09f0d10d8d2c762
diff --git a/runtime/gc/heap.cc b/runtime/gc/heap.cc
index 85b7bf0..deb1b8c 100644
--- a/runtime/gc/heap.cc
+++ b/runtime/gc/heap.cc
@@ -1538,7 +1538,7 @@
           gc_complete_cond_->Wait(self);
         }
         last_gc_type = last_gc_type_;
-        wait_time = NanoTime() - wait_start;;
+        wait_time = NanoTime() - wait_start;
         total_wait_time_ += wait_time;
       }
       if (wait_time > kLongGcPauseThreshold) {