bug#17449: 24.4.50; Empty lines confuse electric-indent-post-self-insert-function.

[Eli Zaretskii]

> Date: Fri, 9 May 2014 10:09:03 +0000
> From: Philipp Rumpf <prumpf@gmail.com>
> 
> In C mode and Python mode, hitting <RET> on an indented but otherwise
> empty line results in an unindented new line at point, rather than an
> indented line.
> 
> To reproduce in emacs -Q:
> 
> M-x python-mode<RET>
> if a == 3:<RET>
> <RET>
> M-: (current-column)<RET>
> 
> Expected result: 4 / indented line
> Actual result: 0 / line not indented

Per the design.  "C-h k RET" displays this text:

  RET (translated from <return>) runs the command newline, which is an
  interactive compiled Lisp function in `simple.el'.

  It is bound to RET.

  (newline &optional ARG INTERACTIVE)

  Insert a newline, and move to left margin of the new line if it's blank.
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^