bug#23655: 25.0.92; Upcasing a rectangular region of text

[Juri Linkov]

>> 0.  emacs -Q
>> 1.  Eval: (put 'upcase-region 'disabled nil)
>>           (put 'downcase-region 'disabled nil)
>> 2.  Visit the attached file.
>> 3.  Move point to just after the comma.
>> 4.  Define a *rectanguar* region: C-x <SPC> C-n C-e
>> 5.  Downcase the rectangular region: C-x C-l
>> 6.  Repeat steps #3 to #5, but this time for upcasing the region
>>     instead of downcasing it ('C-x C-u' instead of 'C-x C-l').
>>
>> The upcased text in the last step is not only the one marked by the
>> rectangular region.  The upcasing command acts as if a linear
>> (i.e. non-rectangular) region was active at that moment.
>
> Thanks for the request.  Since we were unable to find a way to support
> rectangular regions for all region-selecting commands en masse, here
> is a patch to implement this individually for ‘upcase-region’:

Pushed to master.