update README

README.md

@@ -4,22 +4,28 @@ bash library for gentoo utils
 
 ## How to use
 
-`. etools`
+```bash
+source etools
+```
 
 ## Configuration
 
 etools searches for a configuration file at the following locations:
-`/etc/etools/etools.conf`
-`$HOME/.config/etools.conf`
-`$HOME/.config/etools/etools.conf`
+```shell
+/etc/etools/etools.conf
+$HOME/.config/etools.conf
+$HOME/.config/etools/etools.conf
+```
 
 ## What it does
 
 provided function are the following:
-`einfo <info>`
-`ewarn <warning>`
-`eerror <error>`
-`etools_configure`
-`etools_unset`
-`etools_smart_find <package name> [repo]`
+```bash
+einfo <info>
+ewarn <warning>
+eerror <error>
+etools_configure
+etools_unset
+etools_smart_find <package name> [repo]
+```