#942: Add new git_branch_0v_to_dash_v rule

* fix fuckup `branch 0v` by...

...deleting branch `0v` and running `git branch -v` as the user intended

* use quotes consistently

* provide new  solution implementation based on feedback on PR

* rename files to more accurately reflect their more generic contents

* update import statement to match new file name

* update command name in README.md

* separate out matching tests so the pattern is clear for those who add matches in the future

thefuck/rules/git_branch_flag_0_to_flag_dash_v.py

@@ -0,0 +1,36 @@
+from thefuck.shells import shell
+from thefuck.specific.git import git_support
+from thefuck.utils import memoize
+
+'''
+keys are fatfingered entry, values are two-element tuples
+where the first element is "the fix" and the second element
+is "what you meant to do
+ '''
+# clunky when there's only one key, but as others get added, I _think_
+# this will be cleaner
+flags_and_their_fixes = dict()
+flags_and_their_fixes["v"] = ('git branch -D 0v', 'git branch -v')
+
+
+@memoize
+def _supported_flag_fix(command):
+    flag = command.script_parts[2:][0]
+
+    if len(flag) == 2 and flag.startswith("0"):
+        return flags_and_their_fixes[flag[1]]
+    else:
+        return None
+
+
+@git_support
+def match(command):
+    return (command.script_parts
+            and command.script_parts[1] == 'branch'
+            and _supported_flag_fix(command) is not None)
+
+
+@git_support
+def get_new_command(command):
+    fix_parts = _supported_flag_fix(command)
+    return shell.and_(fix_parts[0], fix_parts[1])