Add support of lein "is not task"

README.md

@@ -49,6 +49,17 @@ Did you mean this?
 ➜ fuck
 git branch
 * master
+
+➜ lein rpl
+'rpl' is not a task. See 'lein help'.
+
+Did you mean this?
+         repl
+
+➜ fuck
+nREPL server started on port 54848 on host 127.0.0.1 - nrepl://127.0.0.1:54848
+REPL-y 0.3.1
+...
 ```
 
 ## Installation

setup.py

@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 
 
 setup(name='thefuck',
-      version=1.11,
+      version=1.12,
       description="Magnificent app which corrects your previous console command",
       author='Vladimir Iakovlev',
       author_email='nvbn.rm@gmail.com',

tests/rules/test_lein_not_task.py

@@ -0,0 +1,22 @@
+import pytest
+from mock import Mock
+from thefuck.rules.lein_not_task import match, get_new_command
+
+
+@pytest.fixture
+def is_not_task():
+    return ''''rpl' is not a task. See 'lein help'.
+
+Did you mean this?
+         repl
+'''
+
+
+def test_match(is_not_task):
+    assert match(Mock(script='lein rpl', stderr=is_not_task), None)
+    assert not match(Mock(script='ls', stderr=is_not_task), None)
+
+
+def test_get_new_command(is_not_task):
+    assert get_new_command(Mock(script='lein rpl --help', stderr=is_not_task),
+                           None) == 'lein repl --help'

thefuck/rules/lein_not_task.py

@@ -0,0 +1,15 @@
+import re
+
+
+def match(command, settings):
+    return (command.script.startswith('lein')
+            and "is not a task. See 'lein help'" in command.stderr
+            and 'Did you mean this?' in command.stderr)
+
+
+def get_new_command(command, settings):
+    broken_cmd = re.findall(r"'([^']*)' is not a task",
+                            command.stderr)[0]
+    new_cmd = re.findall(r'Did you mean this\?\n\s*([^\n]*)',
+                         command.stderr)[0]
+    return command.script.replace(broken_cmd, new_cmd, 1)