change formatting

input examples are now given as

```bash
input $ARG1
```

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

basics/links.md

@@ -4,12 +4,16 @@ tags: [ "Documentation", "Basics" ]
 ---
 Link from X to Y.
 
-> ln -s X ../otherdir/Y
+```bash
+ln -s X ../otherdir/Y
+```
 
 If you want a hard link, this will make a single file exist in two locations.
 If it is deleted in one location, it continues to exist in the other.
 
-> ln *X* *Y*
+```bash
+ln *X* *Y*
+```
 
 Both files must be on the same hard drive, as they have the same inode (check this with `ls -i file`).