InsertCompleter: only accept words matching the target buffer word definition
InsertCompleter: only accept words matching the target buffer word definition

The words we store in the WordDB are dependent on the extra_word_chars
options, which can be different for different buffers. When completing
words in a buffer based on the WordDB from another buffer, some candidates
might contains characters that are not considered word character for
the target buffer, ignore those words.

Somasis/kakoune,Somasis/kakoune,danr/kakoune,alexherbo2/kakoune,alexherbo2/kakoune,lenormf/kakoune,casimir/kakoune,danr/kakoune,alexherbo2/kakoune,occivink/kakoune,Somasis/kakoune,Somasis/kakoune,jjthrash/kakoune,lenormf/kakoune,danr/kakoune,jjthrash/kakoune,lenormf/kakoune,jkonecny12/kakoune,casimir/kakoune,occivink/kakoune,mawww/kakoune,lenormf/kakoune,jjthrash/kakoune,mawww/kakoune,occivink/kakoune,jkonecny12/kakoune,mawww/kakoune,mawww/kakoune,casimir/kakoune,casimir/kakoune,occivink/kakoune,jkonecny12/kakoune,danr/kakoune,alexherbo2/kakoune,jjthrash/kakoune,jkonecny12/kakoune