Subject: bug#37036: [PATCH] Inconsistent ASCII and Latin char categories

From: Eli Zaretskii <[email-masked]>
Date: Thu, 15 Aug 2019 18:27:28 +0300

> From: Mattias Engdegård <[email-masked]>
> Date: Thu, 15 Aug 2019 14:17:15 +0200
> 
> The ASCII (a) and Latin (l) character categories are inconsistent in what characters they contain.
> 
> It should be clear what the ASCII category means, but it omits 00-1f (contrary to a comment in the code).
> 
> The Latin category isn't exactly defined anywhere but should reasonably comprise letters from Latin-based scripts. Currently, it also includes many control characters and symbols from the ASCII and Latin-1 Supplement blocks, which seems hard to justify.
> 
> Other changes to Latin could be argued: what modifiers/combining chars should be included? What about IPA and non-IPA phonetics? Ligatures? What about Latin-derived forms such as circled letters? &c. The attached patch does not go there but only fixes the glaring errors in the 00-ff range.

Did you try moving by words after these changes?  What happens in
words that consist of ASCII and non-ASCII Latin characters, for
example?