Merge pull request #1787 from neheb/str

[clang-tidy] remove pointless string init
diff --git a/.clang-tidy b/.clang-tidy
index 8968011..df4c1ed 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -3,9 +3,11 @@
   ,readability-avoid-const-params-in-decls,
   ,readability-non-const-parameter,
   ,readability-redundant-string-cstr,
+  ,readability-redundant-string-init,
 '
 WarningsAsErrors: '
   ,readability-avoid-const-params-in-decls,
   ,readability-non-const-parameter,
   ,readability-redundant-string-cstr,
+  ,readability-redundant-string-init,
 '
diff --git a/src/string_piece_util_test.cc b/src/string_piece_util_test.cc
index b77ae84..61586dd 100644
--- a/src/string_piece_util_test.cc
+++ b/src/string_piece_util_test.cc
@@ -31,7 +31,7 @@
   }
 
   {
-    string empty("");
+    string empty;
     vector<StringPiece> list = SplitStringPiece(empty, ':');
 
     EXPECT_EQ(list.size(), 1);
@@ -82,7 +82,7 @@
   }
 
   {
-    string empty("");
+    string empty;
     vector<StringPiece> list = SplitStringPiece(empty, ':');
 
     EXPECT_EQ("", JoinStringPiece(list, ':'));