[Fix #108] Sync indentation of threading forms with Clojure

[bbatsov]

No description provided.

[magnars]

I'm not convinced that emacs lisp needs to follow clojures' lead on this.

[bbatsov]

@magnars It's a Clojure construct after all and it has the same semantics. I find it odd to have the same thing with the same semantics indented in a different way. As I said already, I'm personally fond of this indentation, but I'm even fonder of consistency and I'd like this to behave similarly in both languages.

[magnars]

I'm not sure consistency with clojure-mode is a goal for dash. This is hardly the sole difference between the two languages and modes. We've used this indentation for the threading macros the last two years - out of sync with clojure-mode the entire time (apart from a brief, but wonderful, moment in time. ;-)) Changing it just to get in line with how Clojure is indented seems entirely needless to me.

[bbatsov]

This is hardly the sole difference between the two languages and modes.

It's one of very few differences actually (regarding indentation - probably only cond and if). After I took over clojure-mode I've tried to align it with emacs-lisp-mode and lisp-mode. Yesterday's indentation drama reminded me of this goal. :-)

I can only assume that a lot of the people using threading macros in Emacs Lisp have done some Clojure, so aligning the indentation in both contexts might reduce the cognitive burden on them.

That's ultimately your call, of course.

[magnars]

It's one of very few differences actually (regarding indentation - probably only cond and if). After I took over clojure-mode I've tried to align it with emacs-lisp-mode and lisp-mode.

Oh, well done. This changes my outlook on the issue quite a bit. Let's go for it.