Stop parsing language-variable cat output to make cat_dir more reliable. (#827)

* Stop parsing language-variable cat output to make cat_dir more reliable.

* Add missing semicolon in readme

README.md

@@ -177,7 +177,7 @@ following rules are enabled by default:
 * `aws_cli` – fixes misspelled commands like `aws dynamdb scan`;
 * `cargo` – runs `cargo build` instead of `cargo`;
 * `cargo_no_command` – fixes wrongs commands like `cargo buid`;
-* `cat_dir` – replaces `cat` with `ls` when you try to `cat` a directory
+* `cat_dir` – replaces `cat` with `ls` when you try to `cat` a directory;
 * `cd_correction` – spellchecks and correct failed cd commands;
 * `cd_mkdir` – creates directories before cd'ing into them;
 * `cd_parent` – changes `cd..` to `cd ..`;