* lisp/progmodes/ruby-mode.el (ruby-toggle-block): Guess the current block,

* lisp/progmodes/ruby-mode.el (ruby-toggle-block): Guess the current block,
not just expect to be at its beginning.  Adjust callees.
Succeed when do-end block has no space before the pipe character.
(ruby-brace-to-do-end): When the original block is one-liner,
convert to multiline.  Reindent the result.

* test/automated/ruby-mode-tests.el:
(ruby-toggle-block-to-multiline): New test.
(ruby-should-indent-buffer, ruby-toggle-block-to-do-end)
(ruby-toggle-block-to-brace): Use buffer-string.