change formatting

input examples are now given as

```bash
input $ARG1
```

While outputs use md's '> ' sign as a quote.

data/khard.md

@@ -4,37 +4,57 @@ tags: [ "Documentation", "Data" ]
 ---
 Get the basic config:
 
-> mkdir ~/.config/khard
+```bash
+mkdir ~/.config/khard
+```
 
-> cp /usr/share/doc/khard/examples/khard/khard.conf.example ~/.config/khard.conf
+```bash
+cp /usr/share/doc/khard/examples/khard/khard.conf.example ~/.config/khard.conf
+```
 
 Short list
 
-> khard list
+```bash
+khard list
+```
 
 Longer list
 
-> khard show
+```bash
+khard show
+```
 
 Show from addressbook 'work'
 
-> khard list -a work
+```bash
+khard list -a work
+```
 
 Make a new contact in address book 'family'
 
-> khard new -a family
+```bash
+khard new -a family
+```
 
-> khard edit grampa
+```bash
+khard edit grampa
+```
 
-> khard remove bob
+```bash
+khard remove bob
+```
 
 Move contact 'nina' from 'work' to 'home' address book.
 
-> khard move -a home nina -A work
+```bash
+khard move -a home nina -A work
+```
 
 ## Advanced
 
 Merge:
 
-> khard merge [-a source_abook] [-u uid|search terms [search terms ...]] [-A target_abook] [-U target_uid|-t target_search_terms]
+```bash
+khard merge [-a source_abook] [-u uid|search terms [search terms ...]] [-A target_abook] [-U target_uid|-t target_search_terms]
+```