title: How to disable auto changing tabs to spaces in the code in Intellij Idea?
body: <p>How to disable auto changing tabs to spaces and removing empty lines, whitespaces in the sourcefiles after it opened?</p>
  
  <p>In other words if the line contains tabs and spaces in one line Idea shouldn't change them. For example if file contains "-->-->....-->public void setAttribute();" Idea shouldn't change tabs to spaces or spaces to tabs. I can disable all autoformattig.</p>