patch 8.2.2678: test for 'autoshelldir' does not reset the option

Problem:    Test for 'autoshelldir' does not reset the option.
Solution:   Reset the option after testing.

Author: brammool

src/testdir/test_terminal3.vim

@@ -502,6 +502,8 @@ func Test_terminal_sync_shell_dir()
     let expected = tmpfolder
   endif
   call assert_equal(expected, getcwd(winnr()))
+
+  set noasd
 endfunc
 
 " Test for modeless selection in a terminal

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2678,
 /**/
     2677,
 /**/