Fix some pep8 issues, mostly spaces

Before:
    4       E101 indentation contains mixed spaces and tabs
    20      E122 continuation line missing indentation or outdented
    1       E124 closing bracket does not match visual indentation
    12      E127 continuation line over-indented for visual indent
    22      E128 continuation line under-indented for visual indent
    2       E211 whitespace before '('
    12      E302 expected 2 blank lines, found 1
    1       E303 too many blank lines (3)
    4       E402 module level import not at top of file
    123     E501 line too long (81 > 79 characters)
    2       E731 do not assign a lambda expression, use a def
    3       W191 indentation contains tabs
    20      W291 trailing whitespace
    3       W293 blank line contains whitespace
    2       W391 blank line at end of file
    69      W503 line break before binary operator

After:
    20      E122 continuation line missing indentation or outdented
    12      E127 continuation line over-indented for visual indent
    22      E128 continuation line under-indented for visual indent
    123     E501 line too long (81 > 79 characters)
    2       E731 do not assign a lambda expression, use a def
    1       W291 trailing whitespace
    68      W503 line break before binary operator

tests/rules/test_composer_not_command.py

@@ -5,34 +5,38 @@ from tests.utils import Command
 
 @pytest.fixture
 def composer_not_command():
-    return """
-
-                                    
-  [InvalidArgumentException]        
-  Command "udpate" is not defined.  
-  Did you mean this?                
-      update
-
-
-"""
+    # that weird spacing is part of the actual command output
+    return (
+        '\n'
+        '\n'
+        '                                    \n'
+        '  [InvalidArgumentException]        \n'
+        '  Command "udpate" is not defined.  \n'
+        '  Did you mean this?                \n'
+        '      update                        \n'
+        '                                    \n'
+        '\n'
+        '\n'
+    )
 
 
 @pytest.fixture
 def composer_not_command_one_of_this():
-    return """
-                            
-
-
-  [InvalidArgumentException]       
-  Command "pdate" is not defined.  
-  Did you mean one of these?       
-      selfupdate                   
-      self-update                  
-      update                       
-
-
-
-"""
+    # that weird spacing is part of the actual command output
+    return (
+        '\n'
+        '\n'
+        '                                   \n'
+        '  [InvalidArgumentException]       \n'
+        '  Command "pdate" is not defined.  \n'
+        '  Did you mean one of these?       \n'
+        '      selfupdate                   \n'
+        '      self-update                  \n'
+        '      update                       \n'
+        '                                   \n'
+        '\n'
+        '\n'
+    )
 
 
 def test_match(composer_not_command, composer_not_command_one_of_this):

tests/rules/test_dirty_untar.py

@@ -40,6 +40,7 @@ parametrize_script = pytest.mark.parametrize('script, fixed', [
     ('tar -xvf {}', 'mkdir -p foo && tar -xvf {} -C foo'),
     ('tar --extract -f {}', 'mkdir -p foo && tar --extract -f {} -C foo')])
 
+
 @parametrize_filename
 @parametrize_script
 def test_match(tar_error, filename, script, fixed):

tests/rules/test_fix_file.py

@@ -85,8 +85,7 @@ Traceback (most recent call last):
   File "/usr/lib/python3.4/re.py", line 293, in _compile
     raise TypeError("first argument must be string or compiled pattern")
 TypeError: first argument must be string or compiled pattern
-"""
-),
+"""),
 
 ('ruby a.rb', 'a.rb', 3, None,
 """

tests/rules/test_git_branch_list.py

@@ -2,6 +2,7 @@ from thefuck import shells
 from thefuck.rules.git_branch_list import match, get_new_command
 from tests.utils import Command
 
+
 def test_match():
     assert match(Command('git branch list'), None)
 

tests/rules/test_git_fix_stash.py

@@ -10,7 +10,7 @@ usage: git stash list [<options>]
    or: git stash ( pop | apply ) [--index] [-q|--quiet] [<stash>]
    or: git stash branch <branchname> [<stash>]
    or: git stash [save [--patch] [-k|--[no-]keep-index] [-q|--quiet]
-		       [-u|--include-untracked] [-a|--all] [<message>]]
+\t\t       [-u|--include-untracked] [-a|--all] [<message>]]
    or: git stash clear
 '''
 

tests/rules/test_git_not_command.py

@@ -30,8 +30,8 @@ def git_not_command_closest():
     return '''git: 'tags' is not a git command. See 'git --help'.
 
 Did you mean one of these?
-	stage
-	tag
+\tstage
+\ttag
 '''
 
 

tests/rules/test_go_run.py

@@ -4,7 +4,7 @@ from tests.utils import Command
 
 
 @pytest.mark.parametrize('command', [
-    Command(script='go run foo'), 
+    Command(script='go run foo'),
     Command(script='go run bar')])
 def test_match(command):
     assert match(command, None)

tests/rules/test_systemctl.py

@@ -3,7 +3,6 @@ from thefuck.rules.systemctl import match, get_new_command
 from tests.utils import Command
 
 
-
 def test_match():
     assert match(Command('systemctl nginx start', stderr='Unknown operation \'nginx\'.'), None)
     assert match(Command('sudo systemctl nginx start', stderr='Unknown operation \'nginx\'.'), None)
@@ -13,6 +12,7 @@ def test_match():
     assert not match(Command('systemctl nginx', stderr='Unknown operation \'nginx\'.'), None)
     assert not match(Command('systemctl start wtf', stderr='Failed to start wtf.service: Unit wtf.service failed to load: No such file or directory.'), None)
 
+
 def test_get_new_command():
     assert get_new_command(Command('systemctl nginx start'), None) == "systemctl start nginx"
     assert get_new_command(Command('sudo systemctl nginx start'), None) == "sudo systemctl start nginx"