Autocomplete wrong case

[HelixSpiral]

With weechat.completion.partial_completion_other set to on the case of the nick you're completing can sometimes be wrong (all lowercase)

To reproduce

• Have two nicks on a channel, I used {Andrew} and {Andrew}|Mobile because they were available on a channel I'm in
• Set weechat.completion.partial_completion_other on
• Type {A and tab-complete
• You will get {andrew} instead of {Andrew}

Now if you add a | to the end of {andrew} and tab-complete you'll get {Andrew}|Mobile with the correct casing.

[Mikaela]

I don't have weechat.completion.partial_completion_other as on, but I had similar issue which might or might not be related.

I had query buffer with nickname where the nick is spelled as NickName and tab for some reason decided to autocomplete it wih all small letters.

[flashcode]

This seems to be the same bug as: https://savannah.nongnu.org/bugs/?32213

[flashcode]

Fixed by #1872, commit f0415c8.