Add brief indentation doc
Add brief indentation doc

evilebottnawi/stylelint,mahtd/stylelint,stylelint/stylelint,stylelint/stylelint,MadLittleMods/stylelint,stylelint/stylelint,heatwaveo8/stylelint,hudochenkov/stylelint,gucong3000/stylelint,stylelint/stylelint,teryaew/stylelint,evilebottnawi/stylelint,heatwaveo8/stylelint,gucong3000/stylelint,gaidarenko/stylelint,heatwaveo8/stylelint,m-allanson/stylelint,hudochenkov/stylelint,gaidarenko/stylelint,gucong3000/stylelint,gaidarenko/stylelint,hudochenkov/stylelint