Fix presubmit failure introduced by r7158.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 1c1addbb48b48ee45f20385707282196ba0d12f3..11f7e230c1bce6fd848991a9a5c317263969002a 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -788,7 +788,8 @@ void LCodeGen::DoModI(LModI* instr) {
       DeoptimizeIf(zero, instr->environment());
     }
 
-    // Sign extend eax to edx. (We are using only the low 32 bits of the values.)
+    // Sign extend eax to edx.
+    // (We are using only the low 32 bits of the values.)
     __ cdq();
 
     // Check for (0 % -x) that will produce negative zero.