docs: style README (#75)

* style: use `---` over `<hr>`

* style: syntax highlight code block

* style: <br> to trailing spaces

README.md

@@ -45,8 +45,9 @@ or
 ### Wipe all profiles
 `konsave -w` or `konsave --wipe`
 
-<br><hr><br>
-
+
+---
+
 
 ## Editing the configuration file
 You can make changes to Konsave's configuration file according to your needs. The configuration file is located in `~/.config/konsave/config.yaml`.
@@ -55,7 +56,7 @@ For KDE Plasma users, the configuration file will be pre-configured.
 
 ### Format
 The configuration file should be formatted in the following way:
-```
+```yaml
 ---
 save:
     name:
@@ -79,7 +80,7 @@ export:
 
 ### Adding more files/folders to backup
 You can add more files/folders in the configuration file like this:
-```
+```yaml
 save:
     name:
         location: "path/to/parent/directory"
@@ -109,15 +110,15 @@ The best example for this is the ".default-release" folder of firefox.
 `${BEGINS_WITH="text"}`: for folders with different names on different computers whose names start with the same thing.  
 
 
-```
+```yaml
 save:
     firefox:
         location: "$HOME/.mozilla/firefox/${ENDS_WITH='.default-release'}"
         entries:
             - chrome
 ```
 
-<hr>
+---
 
 ## Contributing
 Please read [CONTRIBUTION.md](https://github.com/Prayag2/konsave/blob/master/CONTRIBUTION.md) for info about contributing.