[Bug 2059412] Re: SyntaxWarning: invalid escape sequence '\.'

[Nick Rosbrook]

** Changed in: software-properties (Ubuntu)
       Status: Triaged => Fix Committed

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Title:
  SyntaxWarning: invalid escape sequence '\.'

Status in software-properties package in Ubuntu:
  Fix Committed

Bug description:
  Installing software-properties gives

  --->
  /usr/lib/python3/dist-packages/softwareproperties/gtk/DialogMirror.py:197: SyntaxWarning: invalid escape sequence '\.'
    elif re.match("^((ftp)|(http)|(file)|(rsync)|(https))://([a-z]|[A-Z]|[0-9]|:|/|\.|~)+$", uri) == None:
  <---

  Marked as "wishlist" importance because Python still passes that to
  re.match as '\.' instead of '.', so the behavior is correct, as can be
  confirmed with

  --->
  % python3 -c 'print("\.")'
  <string>:1: SyntaxWarning: invalid escape sequence '\.'
  \.
  <---

  In a future Python version they will be eventually a SyntaxError[1].

  [1] https://docs.python.org/3/reference/lexical_analysis.html#escape-
  sequences

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