Daniel Doherty <ded-law@ddoherty.net> writes:

> I have attached a small file that demonstrates the problem, which
> appears to happen following a here-doc.

Can't reproduce with recent ruby-mode. The version string below shows
you're using an Emacs that's older than even the current stable version
(24.2). Could you try with a version from from emacs24 or trunk?

> In GNU Emacs 24.1.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
>  of 2012-08-17 on saturn

If obtaining the full build is too much trouble, you can download and
evaluate just ruby-mode.el:
http://bzr.savannah.gnu.org/lh/emacs/trunk/files/head:/lisp/progmodes/
(the download buttons are in the rightmost column)

Also please check that you're not using "ruby-mode 1.1" from Marmalade.
Evaluating (find-library-name "ruby-mode") should return a path inside
the Emacs tree.

Attaching your example file after reindenting (C-x h C-M-\).