[Lint] Fix triple-quoted to use double-quotes not single

* according to pep8 triple-quotes should use double-quote.

deluge/common.py

@@ -890,7 +890,7 @@ class VersionSplit(object):
 
     """
     def __init__(self, ver):
-        version_re = re.compile(r'''
+        version_re = re.compile(r"""
         ^
         (?P<version>\d+\.\d+)          # minimum 'N.N'
         (?P<extraversion>(?:\.\d+)*)   # any number of extra '.N' segments
@@ -900,7 +900,7 @@ class VersionSplit(object):
             (?P<prerelversion>\d+(?:\.\d+)*)
         )?
         (?P<postdev>(\.post(?P<post>\d+))?(\.dev(?P<dev>\d+))?)?
-        $''', re.VERBOSE)
+        $""", re.VERBOSE)
 
         # Check for PEP 386 compliant version
         match = re.search(version_re, ver)
@@ -991,7 +991,7 @@ def create_localclient_account(append=False):
 
 
 def set_env_variable(name, value):
-    '''
+    """
     :param name: environment variable name
     :param value: environment variable value
 
@@ -1010,7 +1010,7 @@ def set_env_variable(name, value):
 
     Basen on _putenv in TransUtils.py from sourceforge project gramps
     http://sourceforge.net/p/gramps/code/HEAD/tree/branches/maintenance/gramps32/src/TransUtils.py
-    '''
+    """
     # Update Python's copy of the environment variables
     try:
         os.environ[name] = value

setup.py

@@ -486,10 +486,10 @@ setup(
     author='Andrew Resch, Damien Churchill',
     author_email='andrewresch@gmail.com, damoxc@gmail.com',
     keywords='torrent bittorrent p2p fileshare filesharing',
-    long_description='''Deluge is a BitTorrent client that utilizes a
+    long_description="""Deluge is a BitTorrent client that utilizes a
         daemon/client model. There are various user interfaces available for
         Deluge such as the GTK-UI, the Web-UI and a Console-UI. Deluge uses
-        libtorrent in it's backend to handle the BitTorrent protocol.''',
+        libtorrent in it's backend to handle the BitTorrent protocol.""",
     url='http://deluge-torrent.org',
     license='GPLv3',
     cmdclass=cmdclass,