Fix cpplint whitespace/comments issues

Change-Id: Iae286862c85fb8fd8901eae1204cd6d271d69496
diff --git a/compiler/sea_ir/instruction_tools.h b/compiler/sea_ir/instruction_tools.h
index 0c22753..d387100 100644
--- a/compiler/sea_ir/instruction_tools.h
+++ b/compiler/sea_ir/instruction_tools.h
@@ -121,5 +121,5 @@
   static bool IsDefinition(const art::Instruction* instruction);
   static const int instruction_attributes_[];
 };
-} // end namespace sea_ir
+}  // namespace sea_ir
 #endif  // ART_COMPILER_SEA_IR_INSTRUCTION_TOOLS_H_