Export of internal Abseil changes.

--
f4bb8afa9376b4120f56f3beff7b07260da4a5c2 by CJ Johnson <johnsoncj@google.com>:

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PiperOrigin-RevId: 209630262
GitOrigin-RevId: f4bb8afa9376b4120f56f3beff7b07260da4a5c2
Change-Id: I3fedf35011d805ee4a20b92e073b43523b47d15b

absl/time/internal/cctz/include/cctz/civil_time.h

@@ -59,7 +59,7 @@ namespace cctz {
 // inferior fields to their minimum valid value (as described above). The
 // following are examples of how each of the six types would align the fields
 // representing November 22, 2015 at 12:34:56 in the afternoon. (Note: the
-// std::string format used here is not important; it's just a shorthand way of
+// string format used here is not important; it's just a shorthand way of
 // showing the six YMDHMS fields.)
 //
 //   civil_second  2015-11-22 12:34:56

absl/time/internal/cctz/include/cctz/time_zone.h

@@ -279,7 +279,7 @@ bool parse(const std::string&, const std::string&, const time_zone&,
 }  // namespace detail
 
 // Formats the given time_point in the given cctz::time_zone according to
-// the provided format std::string. Uses strftime()-like formatting options,
+// the provided format string. Uses strftime()-like formatting options,
 // with the following extensions:
 //
 //   - %Ez  - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm)
@@ -298,7 +298,7 @@ bool parse(const std::string&, const std::string&, const time_zone&,
 // more than four characters, just like %Y.
 //
 // Tip: Format strings should include the UTC offset (e.g., %z, %Ez, or %E*z)
-// so that the resulting std::string uniquely identifies an absolute time.
+// so that the resulting string uniquely identifies an absolute time.
 //
 // Example:
 //   cctz::time_zone lax;
@@ -314,7 +314,7 @@ inline std::string format(const std::string& fmt, const time_point<D>& tp,
   return detail::format(fmt, p.first, n, tz);
 }
 
-// Parses an input std::string according to the provided format std::string and
+// Parses an input string according to the provided format string and
 // returns the corresponding time_point. Uses strftime()-like formatting
 // options, with the same extensions as cctz::format(), but with the
 // exceptions that %E#S is interpreted as %E*S, and %E#f as %E*f. %Ez
@@ -328,7 +328,7 @@ inline std::string format(const std::string& fmt, const time_point<D>& tp,
 //
 //   "1970-01-01 00:00:00.0 +0000"
 //
-// For example, parsing a std::string of "15:45" (%H:%M) will return a time_point
+// For example, parsing a string of "15:45" (%H:%M) will return a time_point
 // that represents "1970-01-01 15:45:00.0 +0000".
 //
 // Note that parse() returns time instants, so it makes most sense to parse

absl/time/internal/cctz/src/time_zone_format.cc

@@ -533,7 +533,7 @@ const char* ParseSubSeconds(const char* dp, detail::femtoseconds* subseconds) {
   return dp;
 }
 
-// Parses a std::string into a std::tm using strptime(3).
+// Parses a string into a std::tm using strptime(3).
 const char* ParseTM(const char* dp, const char* fmt, std::tm* tm) {
   if (dp != nullptr) {
     dp = strptime(dp, fmt, tm);

absl/time/internal/cctz/src/time_zone_info.cc

@@ -286,7 +286,7 @@ bool TimeZoneInfo::EquivTransitions(std::uint_fast8_t tt1_index,
   return true;
 }
 
-// Use the POSIX-TZ-environment-variable-style std::string to handle times
+// Use the POSIX-TZ-environment-variable-style string to handle times
 // in years after the last transition stored in the zoneinfo data.
 void TimeZoneInfo::ExtendTransitions(const std::string& name,
                                      const Header& hdr) {

absl/time/internal/cctz/src/time_zone_posix.h

@@ -89,7 +89,7 @@ struct PosixTransition {
   } time;
 };
 
-// The entirety of a POSIX-std::string specified time-zone rule. The standard
+// The entirety of a POSIX-string specified time-zone rule. The standard
 // abbreviation and offset are always given. If the time zone includes
 // daylight saving, then the daylight abbrevation is non-empty and the
 // remaining fields are also valid. Note that the start/end transitions