gistfile1.txt

    $script_tag = "<script type='text/javascript' src='%s'></script>\n"; 
    /** 
    * Filter the script tag. 
    * 
    * @since 4.1.0 
    * 
    * @param string  $script_tag Script tag. 
    * @param string  $src        Source of script.
    * @param string  $handle     Script handle. 
    * @param boolean $concat     Is concat
    */ 
    
    $script_tag = apply_filters( 'script_loader_tag', $script_tag, $src, $handle, $this->do_concat );
    $script = sprintf($script_tag, $src);
    
    if ( $this->do_concat ) { 
   	    $this->print_html .= $script; 
 	  } else { 
 		    echo $script; 
 	  }