bower_components/qunit/qunit/qunit.js
function indent(extra) {
  			if (!this.multiline) {
  				return "";
  			}
  			var chr = this.indentChar;
  			if (this.HTML) {
  				chr = chr.replace(/\t/g, "   ").replace(/ /g, "&#160;");
  			}
  			return new Array(this.depth + (extra || 0)).join(chr);
  		}
function indent(extra) {
  			if (!this.multiline) {
  				return "";
  			}
  			var chr = this.indentChar;
  			if (this.HTML) {
  				chr = chr.replace(/\t/g, "   ").replace(/ /g, "&#160;");
  			}
  			return new Array(this.depth + (extra || 0)).join(chr);
  		}
function indent ( extra ) { if ( ! this . multiline ) { return "" ; } var chr = this . indentChar ; if ( this . HTML ) { chr = chr . replace ( / \t / g , "   " ) . replace ( / / g , "&#160;" ) ; } return new Array ( this . depth + ( extra || 0 ) ) . join ( chr ) ; }
Extra can be a number, shortcut for increasing-calling-decreasing
Extra can be a number shortcut for increasing - calling - decreasing