Merge pull request #607 from josephfrazier/yarn-alias

Fix aliased `yarn` commands like `yarn ls`

thefuck/rules/yarn_alias.py

@@ -0,0 +1,14 @@
+import re
+from thefuck.utils import replace_argument, for_app
+
+
+@for_app('yarn', at_least=1)
+def match(command):
+    return ('Did you mean' in command.stderr)
+
+
+def get_new_command(command):
+    broken = command.script_parts[1]
+    fix = re.findall(r'Did you mean `yarn ([^`]*)`', command.stderr)[0]
+
+    return replace_argument(command.script, broken, fix)