code: function() {
  			if ( !this._.inPre && this._.indentation )
  				this._.output.push( this._.indentation );
  			this._.indent = 0;
  		}
docs: Writes the current indentation character. It uses the {@link #indentationChars}
  property, repeating it for the current indentation steps.
  
  // Writes '\t' (e.g.).
  writer.indentation();