diff --git a/double-conversion/double-conversion.cc b/double-conversion/double-conversion.cc
index f372219..6f21a01 100644
--- a/double-conversion/double-conversion.cc
+++ b/double-conversion/double-conversion.cc
@@ -129,7 +129,7 @@
       result_builder->AddPadding('0', remaining_digits);
     }
   } else if (decimal_point >= length) {
-    // "decimal_rep0000.00000" or "decimal_rep.0000"
+    // "decimal_rep0000.00000" or "decimal_rep.0000".
     result_builder->AddSubstring(decimal_digits, length);
     result_builder->AddPadding('0', decimal_point - length);
     if (digits_after_point > 0) {
@@ -137,7 +137,7 @@
       result_builder->AddPadding('0', digits_after_point);
     }
   } else {
-    // "decima.l_rep000"
+    // "decima.l_rep000".
     ASSERT(digits_after_point > 0);
     result_builder->AddSubstring(decimal_digits, decimal_point);
     result_builder->AddCharacter('.');