This appears related to libpango somehow, as in Debian

Bullseye, libpango splits URLs with dashes at the end,

but in Debian Bookworm, the URLs are not split with dashes

at the end, and the bug does not appear to be triggered 

in Bookworm.
This patch makes the assumption that the gtkimhtml widgets

stored in a PidginConversation normally resize in an

alternating manner. However, when the bug is triggered,

only the "entry" gtkimhtml member of PidginConversation

resizes, so we allow "entry" to resize only up to 3 times

in a row.

Compiled and tested on several desktop environments on a few 

GNU/Linux distros by pasting the link mentioned 

here https://issues.imfreedom.org/issue/PIDGIN-17413 moving 

the cursor at the beginning of the buffer, and holding 

the spacebar pressed.