fix(files): take border into account when computing maximum window width

Author: echasnovski

lua/mini/files.lua

@@ -2448,22 +2448,23 @@ H.window_open = function(buf_id, config)
 end
 
 H.window_update = function(win_id, config)
+  -- Preserve some config values
+  local win_config = vim.api.nvim_win_get_config(win_id)
+  config.border, config.title_pos = win_config.border, win_config.title_pos
+
   -- Compute helper data
   local has_tabline = vim.o.showtabline == 2 or (vim.o.showtabline == 1 and #vim.api.nvim_list_tabpages() > 1)
   local max_height = H.window_get_max_height()
+  local max_width = vim.o.columns - (config.border == 'none' and 0 or 2)
 
   -- Ensure proper fit
   config.row = has_tabline and 1 or 0
   config.height = config.height ~= nil and math.min(config.height, max_height) or nil
-  config.width = config.width ~= nil and math.min(config.width, vim.o.columns) or nil
+  config.width = config.width ~= nil and math.min(config.width, max_width) or nil
 
   -- Ensure proper title
   if type(config.title) == 'string' then config.title = H.fit_to_width(config.title, config.width) end
 
-  -- Preserve some config values
-  local win_config = vim.api.nvim_win_get_config(win_id)
-  config.border, config.title_pos = win_config.border, win_config.title_pos
-
   -- Update config
   config.relative = 'editor'
   vim.api.nvim_win_set_config(win_id, config)

tests/screenshots/tests-test_files.lua---Windows---works-with-too-small-dimensions

@@ -1,5 +1,5 @@
 -|---------|-----
-1|┌…-files/commo┐
+1|┌…iles/common ┐
 2|│ .a-dir     │
 3|│ a-dir      │
 4|│ b-dir      │