change formatting

input examples are now given as

```bash
input $ARG1
```

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

system/awk.md

@@ -8,39 +8,55 @@ See a file's contents:
 
 Return full contents of a string:
 
-> awk '{ print }' file
+```bash
+awk '{ print }' file
+```
 
 Print the first and second column:
 
-> awk '{print$1$2}'
+```bash
+awk '{print$1$2}'
+```
 
 Return every line with the word 'the' (like grep):
 
-> awk '/the/{print}' file
+```bash
+awk '/the/{print}' file
+```
 
 Print everything containing a lowercase letter:
 
-> awk '/[a-z]/{print}' file
+```bash
+awk '/[a-z]/{print}' file
+```
 
 Same with numbers [0-9], or using a caret we can show lines starting with a number - ^[0-9], or ending with an uppercase letter - $[A-Z].
 
 # Conditionals
 
-> awk '{ if($1 ~ /123/) print }' file
+```bash
+awk '{ if($1 ~ /123/) print }' file
+```
 
 Check if the first column is equal to 1 or 2 or 3, and if so then print that line.
 
 Grep for 'hawk' in a story:
 
-> awk '/hawk/' story.txt
+```bash
+awk '/hawk/' story.txt
+```
 
 Return any line with one or more "&" sequences:
 
-> awk '/&+/' script.sh
+```bash
+awk '/&+/' script.sh
+```
 
 The pipe is used for 'or', so 'Orcs or drums' would be:
 
-> awk '/Orcs|Drums/' story.txt
+```bash
+awk '/Orcs|Drums/' story.txt
+```
 
 Basic variables are: