Docs: Update info from js.md regarding plugins.js

Add information about the script from the `plugins.js` file.

Ref   #1554
Close #1558

doc/js.md

@@ -22,6 +22,12 @@ One approach is to put jQuery plugins inside of a `(function($){ ...
 blanket. Read more about [jQuery plugin
 authoring](http://docs.jquery.com/Plugins/Authoring#Getting_Started)
 
+By default the `plugins.js` file contains a small script to avoid `console`
+errors in browsers that lack a `console`. The script will make sure that, if
+a console method isn't available, that method will have the value of empty
+function, thus, preventing the browser from throwing an error.
+
+
 ## vendor
 
 This directory can be used to contain all 3rd party library code.

doc/misc.md

@@ -65,7 +65,7 @@ In the repo the `.htaccess` is used for:
 * It blocks access to files that can expose sensitive information.
 * It reduces MIME type security risks
 * It forces compressing (gzipping)
-* It tells tell the browser whether they should request a specific file from the
+* It tells the browser whether they should request a specific file from the
   server or whether they should grab it from the browser's cache
 
 When using `.htaccess` we recommend reading all inline comments (the rules after