change formatting

input examples are now given as

```bash
input $ARG1
```

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

system/exiftool

@@ -1,25 +1,38 @@
-
+---
+title: "exiftool"
+tags: [ "Documentation", "Metadata" ]
+---
 
 Find metadata.
 
-> exiftool image.jpg
+```bash
+exiftool image.jpg
+```
 
 Find info on all images in current directory.
 
-> exiftool -ext .png .
+```bash
+exiftool -ext .png .
+```
 
 You can make this recurring with the -r switch.
 
 And overwrite all metadata:
 
-> exiftool -all= -overwrite_original -ext jpg .
+```bash
+exiftool -all= -overwrite_original -ext jpg .
+```
 
 Or just GPS data:
 
-> exiftool -gps:all= *.jpg
+```bash
+exiftool -gps:all= *.jpg
+```
 
 You can also use the imagemagick tool:
 
-> identify -verbose
+```bash
+identify -verbose
+```