using assert_not instead of refute
Merge pull request #11868 from rajcybage/fix_refute

using assert_not instead of refute
 #11804: Add description of action in Getting Started Guide

[ci skip]

Closes #11804
Updated outdated initialization guide [ci skip]
Add String#remove(pattern) as a short-hand for the common pattern of String#gsub(pattern, '')
Merge pull request #11847 from AJ-Acevedo/master

Updated outdated initialization guide [ci skip]
Merge pull request #11807 from jetthoughts/11804_actions_are_public_methods

Add description of action in Getting Started Guide [ci skip]