patch 9.2.0345: Wrong autoformatting with 'autocomplete'

Problem:  Wrong autoformatting with 'autocomplete'.
Solution: Don't trigger autoformatting when ending autocompletion
          without selecting an item (zeertzjq).

fixes:  #19954
closes: #19970

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/insexpand.c

@@ -2956,7 +2956,7 @@ ins_compl_stop(int c, int prev_mode, int retval)
 	    want_cindent = FALSE;	// don't do it again
 	}
     }
-    else
+    else if (!compl_autocomplete || compl_used_match)
     {
 	int prev_col = curwin->w_cursor.col;
 

src/testdir/test_ins_complete.vim

@@ -6289,4 +6289,20 @@ func Test_ins_register_preinsert_autocomplete()
   delfunc TestOmni
 endfunc
 
+func Test_autocomplete_with_auto_format()
+  call test_override("char_avail", 1)
+  new
+  setlocal formatoptions=tcq textwidth=9 autocomplete noautoindent
+  call feedkeys("ia b c d\<Esc>ie f g\<Esc>", 'tx')
+  call assert_equal(['a b c e f', 'gd'], getline(1, '$'))
+
+  %delete
+  setlocal autoindent
+  call feedkeys("ia b c d\<Esc>ie f g\<Esc>", 'tx')
+  call assert_equal(['a b c e f', 'gd'], getline(1, '$'))
+
+  bw!
+  call test_override("char_avail", 0)
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab nofoldenable

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    345,
 /**/
     344,
 /**/