Update markdown and tabs and stuff

pages/2013-02-06-A-Step-Back.md

@@ -21,11 +21,12 @@ what I did, and then I branched off the last commit I blogged about
 
 For future reference (I'll probably cheat again someday) there were the commands for this:
 
-	git commit -m 'Bad excuse for not checking in before'
-	git checkout -b new_master OLD_COMMIT_SHA
-	git merge --strategy=ours master
-	git checkout master
-	git merge new_master
+    :::bash
+    $ git commit -m 'Bad excuse for not checking in before'
+    $ git checkout -b new_master OLD_COMMIT_SHA
+    $ git merge --strategy=ours master
+    $ git checkout master
+    $ git merge new_master
 
 The resulting commit is found at
 [f74ec287db](https://github.com/thomasloven/os5/tree/f74ec287db488a7bda5