README.md: cosmetic fix

Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>

README.md

@@ -6,10 +6,11 @@ This is the OpenWrt "packages"-feed containing community-maintained packages.
 
 ## Usage
 
-This feed is enabled by default. To install all its package definitions:
-
-Run: ./scripts/feeds update packages
-Run: ./scripts/feeds install -a -p packages
+This feed is enabled by default. To install all its package definitions, run:
+```
+./scripts/feeds update packages
+./scripts/feeds install -a -p packages
+```
 
 ## License