fix: guess text edit once and for all

Author: Saghen

lua/blink/cmp/accept/text-edits.lua

@@ -48,16 +48,16 @@ function text_edits.guess_text_edit(bufnr, item)
 
   -- Search forward/backward for the start/end of the word
   local start_col = current_col
-  while start_col > 1 do
-    local char = line:sub(start_col - 1, start_col - 1)
+  while start_col > 0 do
+    local char = line:sub(start_col, start_col)
     if char:match('[%w_\\-]') == nil then break end
     start_col = start_col - 1
   end
 
   -- convert to 0-index
   return {
     range = {
-      start = { line = current_line - 1, character = start_col - 1 },
+      start = { line = current_line - 1, character = start_col },
       ['end'] = { line = current_line - 1, character = current_col },
     },
     newText = word,