adding in files for the cd-cs feature

README.md

@@ -179,6 +179,7 @@ following rules are enabled by default:
 * `cargo_no_command` – fixes wrongs commands like `cargo buid`;
 * `cat_dir` – replaces `cat` with `ls` when you try to `cat` a directory;
 * `cd_correction` – spellchecks and correct failed cd commands;
+* `cd_cs` – changes `cs` to `cd`;
 * `cd_mkdir` – creates directories before cd'ing into them;
 * `cd_parent` – changes `cd..` to `cd ..`;
 * `chmod_x` – add execution bit;

tests/rules/test_cd_cs.py

@@ -0,0 +1,11 @@
+from thefuck.rules.cd_cs import match, get_new_command
+from thefuck.types import Command
+
+
+def test_match():
+    assert match(Command('cs', 'cs: command not found'))
+    assert match(Command('cs /etc/', 'cs: command not found'))
+
+
+def test_get_new_command():
+    assert get_new_command(Command('cs /etc/', 'cs: command not found')) == 'cd /etc/'

thefuck/rules/cd_cs.py

@@ -0,0 +1,16 @@
+# Redirects cs to cd when there is a typo
+# Due to the proximity of the keys - d and s, I found this to be a common problem for me
+# > cs /etc/
+# cs: command not found
+
+
+def match(command):
+    if command.script_parts[0] == 'cs':
+        return True
+
+
+def get_new_command(command):
+    return 'cd' + ''.join(command.script[2:])
+
+
+priority = 900