example for reindent using builder's keybindings

reindent.css

 bind "exclam" { "push-selection" ()                          
                 "movement" (first-char, 0, 1, 0)             
                 "movement" (first-nonspace-char, 1, 1, 0)    
                 "delete-selection" ()                        
                 "auto-indent" ()                             
                 "pop-selection" () } ;