Fix output printing with python3

I'm not sure what print_safe_encoding is trying to do
(Ie834931a549175471af029a6ec4d5794543d8c92).

  print(str.encode(sys.stdout.encoding, 'replace'))

means that print() ends up getting a bytes-object encoded in the
output encoding.  Thus print() is then going to output this as raw
bytes... not only is unicode going to come out as "\x..\x.." etc, but
even newlines get squished and you end up with stuff like

  $ /tmp/gitreview3/bin/git-review
  b'remote: \rremote: Processing changes: updated: 1, refs: 1\rremote: Processing changes: updated: 1,

I think this problem stems from not ensuring that incoming data
(output of git) is encoded as a string.  By setting
universal_newlines=True in run_command_status() we automatically
ensure that any incoming data is a unicode str, not bytes.

The final section, with the message about rhbz#1058167, appears to be
related to running git under an alternative locale where it's output
is translated.  I1bf1124f0b09d6658a7b0703e3b9e74ed80f4eea changed
things to run the commands under C locale, so there shouldn't be
unicode in here I wouldn't think.  But, by ensuring it's just a
string, we can print() it safely anyway.

Change-Id: I596dcba317ecfbaf437cb72d9850580ed6765fce

git_review/cmd.py

@@ -68,13 +68,6 @@ _rewrites = None
 _rewrites_push = None
 
 
-def print_safe_encoding(str):
-    if sys.stdout.encoding is None:
-        print(str)
-    else:
-        print(str.encode(sys.stdout.encoding, 'replace'))
-
-
 class colors(object):
     yellow = '\033[33m'
     green = '\033[92m'
@@ -154,9 +147,8 @@ def run_command_status(*argv, **kwargs):
                          stdin=subprocess.PIPE if stdin else None,
                          stdout=subprocess.PIPE,
                          stderr=subprocess.STDOUT,
-                         env=newenv)
+                         env=newenv, universal_newlines=True)
     (out, nothing) = p.communicate(stdin)
-    out = out.decode('utf-8', 'replace')
     return (p.returncode, out.strip())
 
 
@@ -266,7 +258,7 @@ def run_custom_script(action):
             raise CustomScriptException(status, output, [path], {})
         elif output and VERBOSE:
             print("script %s output is:" % (path))
-            print_safe_encoding(output)
+            print(output)
 
 
 def git_config_get_value(section, option, default=None, as_bool=False):
@@ -659,7 +651,7 @@ def query_reviews_over_ssh(remote_url, project=None, change=None,
         "gerrit", "query",
         "--format=JSON %s" % query)
     if VERBOSE:
-        print_safe_encoding(output)
+        print(output)
 
     changes = []
     try:
@@ -671,7 +663,7 @@ def query_reviews_over_ssh(remote_url, project=None, change=None,
                         changes.append(data)
                 except Exception:
                     if VERBOSE:
-                        print_safe_encoding(output)
+                        print(output)
     except Exception as err:
         raise parse_exc(err)
     return changes
@@ -738,11 +730,11 @@ def update_remote(remote):
     cmd = "git remote update %s" % remote
     (status, output) = run_command_status(cmd)
     if VERBOSE:
-        print_safe_encoding(output)
+        print(output)
     if status != 0:
         print("Problem running '%s'" % cmd)
         if not VERBOSE:
-            print_safe_encoding(output)
+            print(output)
         return False
     return True
 
@@ -850,7 +842,7 @@ def rebase_changes(branch, remote, interactive=True):
     if status != 0:
         print("Errors running %s" % cmd)
         if interactive:
-            print_safe_encoding(output)
+            print(output)
         return False
     _orig_head = output
 
@@ -871,8 +863,8 @@ def rebase_changes(branch, remote, interactive=True):
     if status != 0:
         print("Errors running %s" % cmd)
         if interactive:
-            print_safe_encoding(output)
-            print("It is likely that your change has a merge conflict. "
+            print(output)
+            printwrap("It is likely that your change has a merge conflict. "
                       "You may resolve it in the working tree now as "
                       "described above and then run 'git review' again, or "
                       "if you do not want to resolve it yet (note that the "
@@ -892,7 +884,7 @@ def undo_rebase():
     (status, output) = run_command_status(cmd)
     if status != 0:
         print("Errors running %s" % cmd)
-        print_safe_encoding(output)
+        print(output)
         return False
     return True
 
@@ -919,7 +911,7 @@ def assert_one_change(remote, branch, yes, have_hook):
     (status, output) = run_command_status(cmd)
     if status != 0:
         print("Had trouble running %s" % cmd)
-        print_safe_encoding(output)
+        print(output)
         sys.exit(1)
     filtered = filter(None, output.split("\n"))
     output_lines = sum(1 for s in filtered)
@@ -1655,7 +1647,7 @@ def _main():
         print("\t%s\n" % cmd)
     else:
         (status, output) = run_command_status(cmd)
-        print_safe_encoding(output)
+        print(output)
 
     if options.finish and not options.dry and status == 0:
         finish_branch(branch)
@@ -1670,16 +1662,7 @@ def main():
     try:
         _main()
     except GitReviewException as e:
-        # If one does unguarded print(e) here, in certain locales the implicit
-        # str(e) blows up with familiar "UnicodeEncodeError ... ordinal not in
-        # range(128)". See rhbz#1058167.
-        try:
-            u = unicode(e)
-        except NameError:
-            # Python 3, we're home free.
         print(e)
-        else:
-            print(u.encode('utf-8'))
         sys.exit(getattr(e, 'EXIT_CODE', -1))