patch 8.2.2430: :vimgrep expands wildcards twice

Problem:    :vimgrep expands wildcards twice.
Solution:   Do not expand wildcards a second time.

Author: brammool

src/arglist.c

@@ -315,10 +315,10 @@ get_arglist_exp(
 	return FAIL;
     if (wig == TRUE)
 	i = expand_wildcards(ga.ga_len, (char_u **)ga.ga_data,
-					fcountp, fnamesp, EW_FILE|EW_NOTFOUND);
+			     fcountp, fnamesp, EW_FILE|EW_NOTFOUND|EW_NOTWILD);
     else
 	i = gen_expand_wildcards(ga.ga_len, (char_u **)ga.ga_data,
-					fcountp, fnamesp, EW_FILE|EW_NOTFOUND);
+			     fcountp, fnamesp, EW_FILE|EW_NOTFOUND|EW_NOTWILD);
 
     ga_clear(&ga);
     return i;

src/quickfix.c

@@ -6053,7 +6053,7 @@ vgr_process_args(
 	return FAIL;
     }
 
-    // parse the list of arguments
+    // Parse the list of arguments, wildcards have already been expanded.
     if (get_arglist_exp(p, &args->fcount, &args->fnames, TRUE) == FAIL)
 	return FAIL;
     if (args->fcount == 0)

src/testdir/test_quickfix.vim

@@ -2865,6 +2865,13 @@ func Test_vimgrep()
   call XvimgrepTests('l')
 endfunc
 
+func Test_vimgrep_wildcards_expanded_once()
+  new X[id-01] file.txt
+  call setline(1, 'some text to search for')
+  vimgrep text %
+  bwipe!
+endfunc
+
 " Test for incsearch highlighting of the :vimgrep pattern
 " This test used to cause "E315: ml_get: invalid lnum" errors.
 func Test_vimgrep_incsearch()

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2430,
 /**/
     2429,
 /**/