Subject: bug#63438: 30.0.50; abbrev mode wrongly capitalizes with mixed capitalized words

From: Eli Zaretskii <[email-masked]>
Date: Thu, 11 May 2023 16:07:47 +0300

> From: Daniel Fleischer <[email-masked]>
> Cc: [email-masked]
> Date: Thu, 11 May 2023 14:03:43 +0300
> 
> I think even simpler: make sure abbrev insertion only works when the
> input word is strictly (case sensitive) different than the expansion
> word; leave everything else as is.
> 
> Example: with a rule like "foobarical -> fooBarical" then 
> 
> Foobarical -> FooBarical (as is today)
> FOOBARICAL -> FOOBARICAL (as is today)
> 
> but fooBarical -> fooBarical, because it's already what we want. 

Sorry, that's an incompatible change in long-standing behavior.  We
cannot do that unconditionally.  We _can_ make this opt-in behavior.