Remove explicit flush calls since line_buffering is enabled.

attic/archive.py

@@ -497,7 +497,6 @@ def report_progress(self, msg, error=False):
         if error:
             self.error_found = True
         print(msg, file=sys.stderr if error else sys.stdout)
-        sys.stderr.flush()
 
     def identify_key(self, repository):
         cdata = repository.get(next(self.chunks.iteritems())[0])

attic/archiver.py

@@ -611,8 +611,8 @@ def run(self, args=None):
 def main():
     # Make sure stdout and stderr have errors='replace') to avoid unicode
     # issues when print()-ing unicode file names
-    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, sys.stdout.encoding, 'replace', line_buffering=sys.stdout.line_buffering)
+    sys.stdout = io.TextIOWrapper(sys.stdout.buffer, sys.stdout.encoding, 'replace', line_buffering=True)
-    sys.stderr = io.TextIOWrapper(sys.stderr.buffer, sys.stderr.encoding, 'replace', line_buffering=sys.stderr.line_buffering)
+    sys.stderr = io.TextIOWrapper(sys.stderr.buffer, sys.stderr.encoding, 'replace', line_buffering=True)
     archiver = Archiver()
     try:
         exit_code = archiver.run(sys.argv[1:])

attic/repository.py

@@ -244,7 +244,6 @@ def report_error(msg):
             nonlocal error_found
             error_found = True
             print(msg, file=sys.stderr)
-            sys.stderr.flush()
 
         assert not self._active_txn
         try: