Revert "Remove control character stripping."

This reverts commit b207f0e.

Author: Byron

git/util.py

@@ -364,7 +364,6 @@ class RemoteProgress(object):
                  '_seen_ops',
                  'error_lines',  # Lines that started with 'error:' or 'fatal:'.
                  'other_lines')  # Lines not denoting progress (i.e.g. push-infos).
-    re_ansi_escape = re.compile(r'\x1B[@-_][0-?]*[ -/]*[@-~]')
     re_op_absolute = re.compile(r"(remote: )?([\w\s]+):\s+()(\d+)()(.*)")
     re_op_relative = re.compile(r"(remote: )?([\w\s]+):\s+(\d+)% \((\d+)/(\d+)\)(.*)")
 
@@ -393,7 +392,17 @@ def _parse_progress_line(self, line):
 
         # find escape characters and cut them away - regex will not work with
         # them as they are non-ascii. As git might expect a tty, it will send them
-        line = self.re_ansi_escape.sub('', line)
+        last_valid_index = None
+        for i, c in enumerate(reversed(line)):
+            if ord(c) < 32:
+                # its a slice index
+                last_valid_index = -i - 1
+            # END character was non-ascii
+        # END for each character in line
+        if last_valid_index is not None:
+            line = line[:last_valid_index]
+        # END cut away invalid part
+        line = line.rstrip()
 
         cur_count, max_count = None, None
         match = self.re_op_relative.match(line)