pass: update formatting

pass.md

@@ -9,37 +9,51 @@ Reference
 
 ### Create
 
-    $ pass init [-p] <gpg-id>
-    $ pass git init
-    $ pass git remote add origin <your.git:repository>
-    $ pass git push -u --all
+``` bash
+$ pass init [-p] <gpg-id>
+$ pass git init
+$ pass git remote add origin <your.git:repository>
+$ pass git push -u --all
+```
 
 ### Store
 
-    $ pass insert [-m] twitter.com/rsc
-    $ pass generate [-n] twitter.com/rsc length
+``` bash
+$ pass insert [-m] twitter.com/rsc
+$ pass generate [-n] twitter.com/rsc length
+```
 
 ### Retreive
 
-    $ pass ls twitter.com/
-    $ pass show twitter.com/rsc
+``` bash
+$ pass ls twitter.com/
+$ pass show twitter.com/rsc
+```
 
 ### Search
 
-    $ pass find twitter.com
+``` bash
+$ pass find twitter.com
+```
 
 ### Management
 
-    $ pass mv twitter.com twitter.com/rsc
-    $ pass rm [-rf] twitter.com
-    $ pass cp twitter.com/rsc twitter.com/ricosc
+``` bash
+$ pass mv twitter.com twitter.com/rsc
+$ pass rm [-rf] twitter.com
+$ pass cp twitter.com/rsc twitter.com/ricosc
+```
 
-    $ pass edit twitter.com/rsc
+``` bash
+$ pass edit twitter.com/rsc
+```
 
 ### Synchronize
 
-    $ pass git push
-    $ pass git pull
+```
+$ pass git push
+$ pass git pull
+```
 
 ## References