Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/runtime/gc/accounting/space_bitmap-inl.h b/runtime/gc/accounting/space_bitmap-inl.h
index d074a0f..a4cfe3c 100644
--- a/runtime/gc/accounting/space_bitmap-inl.h
+++ b/runtime/gc/accounting/space_bitmap-inl.h
@@ -59,7 +59,7 @@
                                    const FingerVisitor& finger_visitor) const {
   DCHECK_LT(visit_begin, visit_end);
 
-  const size_t word_span = kAlignment * kBitsPerWord; // Equals IndexToOffset(1).
+  const size_t word_span = kAlignment * kBitsPerWord;  // Equals IndexToOffset(1).
   const size_t bit_index_start = (visit_begin - heap_begin_) / kAlignment;
   const size_t bit_index_end = (visit_end - heap_begin_ - 1) / kAlignment;