Expand description of zero-length rule
Expand description of zero-length rule

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