fix(cmdline): do not autocorrect Command-line abbreviations

Author: echasnovski

doc/mini-cmdline.txt

@@ -205,6 +205,8 @@ Notes:
   the lowest string distance.
   See |MiniCmdline.default_autocorrect_func()| for details.
 
+- Word that matches some Command-line |abbreviation| is not autocorrected.
+
 - If current command expects only a single argument (like |:colorscheme|), then
   autocorrection will happen only just before executing the command.
 

lua/mini/cmdline.lua

@@ -179,6 +179,8 @@ end
 ---   the lowest string distance.
 ---   See |MiniCmdline.default_autocorrect_func()| for details.
 ---
+--- - Word that matches some Command-line |abbreviation| is not autocorrected.
+---
 --- - If current command expects only a single argument (like |:colorscheme|), then
 ---   autocorrection will happen only just before executing the command.
 ---
@@ -738,7 +740,7 @@ H.autocorrect = function(is_final)
   -- Compute autocorrection
   local state_to_use = is_final and state or state_prev
   local word = state_to_use.complpat
-  if word == '' then return end
+  if word == '' or vim.fn.maparg(word, 'c', true) ~= '' then return end
 
   local func = H.cache.config.autocorrect.func or MiniCmdline.default_autocorrect_func
   local new_word = func({ word = word, type = state_to_use.compltype }) or word

tests/test_cmdline.lua

@@ -840,6 +840,30 @@ T['Autocorrect']['respects mappings'] = function()
   eq(child.fn.histget('cmd', -1), 'echo')
 end
 
+T['Autocorrect']['respects abbreviations'] = function()
+  child.lua([[
+    _G.log = {}
+    local orig = MiniCmdline.default_autocorrect_func
+    MiniCmdline.default_autocorrect_func = function(...)
+      table.insert(_G.log, vim.deepcopy({ ... }))
+      return orig(...)
+    end
+  ]])
+
+  child.cmd('cabbrev Y wincmd')
+  child.cmd('cnoreabbrev <buffer> D bwipeout')
+
+  type_keys(':', 'Y', ' ')
+  validate_cmdline('wincmd ')
+  type_keys('<Esc>')
+
+  type_keys(':', 'D', '<CR>')
+  eq(child.fn.histget('cmd', -1), 'bwipeout')
+
+  -- Should not call `config.autocorrect.func` for abbreviations
+  eq(child.lua_get('_G.log'), {})
+end
+
 T['Autocorrect']['can act after mappings appended text'] = function()
   -- Should act if text increases latest word
   child.cmd('cnoremap <C-x> www')