Fix CQS signal. Id] 1540596 -- readability-redundant-string-init in fbcode/proxygen/lib/http

Reviewed By: dtolnay

Differential Revision: D73097505

fbshipit-source-id: 43f1a9cdcf24c7ef3e660bc6737818eba0747944

Author: generatedunixname89002005287564

proxygen/lib/http/HTTPHeaders.h

@@ -529,7 +529,7 @@ bool HTTPHeaders::forEachValueOfHeader(HTTPHeaderCode code, LAMBDA func) const {
 template <typename T>
 std::string HTTPHeaders::combine(const T& header,
                                  const std::string& separator) const {
-  std::string combined = "";
+  std::string combined;
   forEachValueOfHeader(header, [&](const std::string& value) -> bool {
     if (combined.empty()) {
       combined.append(value);

proxygen/lib/http/test/RFC2616Test.cpp

@@ -42,7 +42,7 @@ TEST(QvalueTest, Basic) {
   }
 
   {
-    string test("");
+    string test;
     // The spec says a blank one is ok but empty headers are disallowed in SPDY?
     EXPECT_FALSE(RFC2616::parseQvalues(test, output));
     EXPECT_EQ(output.size(), 0);