update readme

Author: krvajal

README.md

@@ -8,15 +8,17 @@ This extension provides support for the Fortran programming language. It include
 * Code Snippets
 * Documentation on hover for intrisic functions
 * Code linting based on `gfortran` to show errors swiggles in your code
+
 ## Snippets
 This are some of the snippets included 
-
 #### Program skeleton
-
 ![program snippet](https://media.giphy.com/media/OYdq9BKYMOOdy/giphy.gif )
-
 #### Module skeleton
 ![module snippet](https://media.giphy.com/media/3ohzdUNRuio5FfyF1u/giphy.gif )
+
+## Error swiggles
+To trigger code validations you must save the file first.
+
 ## Requirements
 For the linter to work you need to have `gfortran` on your path, or wherever you configure it to be.
 ## Issues