problem with the first character in free buffer

[pascalpoitras]

Bug summary

There is a problem with the first character in free buffer when we use _chat_word _chat_bol and so on

Steps to reproduce

1. /mouse enable
2. /key bindctxt mouse @chat(core.my_buffer):button1 /print -core ${_chat_word}
3. /print -newbuffer my_buffer -free a b
4. then left click on the a, a blank line is then printed on the core buffer instead of the letter a
5. then left click on the b, a is print on the core buffer (not b)

Current behavior

free buffer content first character mess _chat_word, _chat_bol, _chat_eol and so on

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• WeeChat version: 3.7-dev
• OS, distribution and version: deb 11
• Terminal: kitty
• Terminal multiplexer (screen/tmux/…/none): tmux