Export of internal Abseil changes

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ea0cfebeb69b25bec343652bbe1a203f5476c51a by Mark Barolak <mbar@google.com>:

Change "std::string" to "string" in places where a "std::" qualification was incorrectly inserted by automation.

PiperOrigin-RevId: 300108520
GitOrigin-RevId: ea0cfebeb69b25bec343652bbe1a203f5476c51a
Change-Id: Ie3621e63a6ebad67b9fe56a3ebe33e1d50dac602

absl/flags/internal/flag.cc

@@ -408,7 +408,7 @@ void FlagImpl::CheckDefaultValueParsingRoundtrip() const {
     ABSL_INTERNAL_LOG(
         FATAL,
         absl::StrCat("Flag ", Name(), " (from ", Filename(),
-                     "): std::string form of default value '", v,
+                     "): string form of default value '", v,
                      "' could not be parsed; error=", error));
   }