variable format column width breaks docstring

[Adam Spiers]

If we take the hydra-toggle example from hydra-examples.el and change the %` to %3` in order to right-align the displayed values:

(defhydra hydra-toggle (:color pink)
  "
_a_ abbrev-mode:       %3`abbrev-mode
_d_ debug-on-error:    %3`debug-on-error
_f_ auto-fill-mode:    %3`auto-fill-function
_t_ truncate-lines:    %3`truncate-lines
_w_ whitespace-mode:   %3`whitespace-mode

"
  ("a" abbrev-mode nil)
  ("d" toggle-debug-on-error nil)
  ("f" auto-fill-mode nil)
  ("t" toggle-truncate-lines nil)
  ("w" whitespace-mode nil)
  ("q" nil "quit"))

then the colour highlighting breaks, e.g. the q for quit is not always coloured correctly, and after toggling some of the options, random letters get highlighted, e.g. look at the p in whitespace-mode here:

[Adam Spiers]

I tried to work around this with %(format "%3d" abbrev-mode) but that resulted in extra double-quotes around the value.

[Adam Spiers]

I think I traced it to the use of S as the format specifier:

hydra/hydra.el

Lines 786 to 788 in 112e689

 (when (or (zerop lspec) 
           (/= (aref spec (1- (length spec))) ?s)) 
   (setq spec (concat spec "S"))) 

If I change that to s then the double-quotes vanish.

[Adam Spiers]

Ahah! I figured out from the source that I can choose the specifier myself via %s(format "%3d" abbrev-mode) and then it works. So this is a workable alternative to the original issue.