Ran reindent.py from cpython tools on all python scripts

Citing from reindent docs:

    Change Python (.py) files to use 4-space indents and no hard tab
    characters. Also trim excess spaces and tabs from ends of lines, and
    remove empty lines at the end of files.  Also ensure the last line
    ends with a newline.

Citing from PEP 8:

    Use 4 spaces per indentation level.

    Python 2 code indented with a mixture of tabs and spaces should be
    converted to using spaces exclusively.

    Don't write string literals that rely on significant trailing
    whitespace. Such trailing whitespace is visually indistinguishable
    and some editors (or more recently, reindent.py) will trim them.

Also PyLint recommends not to have trailing whitespace on any line.

koji/auth.py

@@ -3,7 +3,7 @@
 #
 #    Koji is free software; you can redistribute it and/or
 #    modify it under the terms of the GNU Lesser General Public
-#    License as published by the Free Software Foundation; 
+#    License as published by the Free Software Foundation;
 #    version 2.1 of the License.
 #
 #    This software is distributed in the hope that it will be useful,
@@ -247,7 +247,7 @@ class Session(object):
         if not result:
             raise koji.AuthError, 'invalid user_id: %s' % user_id
         name, usertype, status = result
-        
+
         if status != koji.USER_STATUS['NORMAL']:
             raise koji.AuthError, 'logins by %s are not allowed' % name
 
@@ -394,7 +394,7 @@ class Session(object):
                 raise koji.AuthError, '%s is not authorized to login other users' % client_dn
         else:
             username = client_name
-        
+
         cursor = context.cnx.cursor()
         query = """SELECT id FROM users
         WHERE name = %(username)s"""
@@ -596,7 +596,7 @@ class Session(object):
         """
         if not name:
             raise koji.GenericError, 'a user must have a non-empty name'
-        
+
         if usertype == None:
             usertype = koji.USERTYPES['NORMAL']
         elif not koji.USERTYPES.get(usertype):
@@ -606,7 +606,7 @@ class Session(object):
             status = koji.USER_STATUS['NORMAL']
         elif not koji.USER_STATUS.get(status):
             raise koji.GenericError, 'invalid status: %s' % status
-        
+
         cursor = context.cnx.cursor()
         select = """SELECT nextval('users_id_seq')"""
         cursor.execute(select, locals())