patch 8.2.0304: terminal test if failing on some systems

Problem:    Terminal test if failing on some systems.
Solution:   Wait for the job to finish. (James McCoy)

src/testdir/test_terminal.vim

@@ -781,7 +781,8 @@ func Test_terminal_special_chars()
   call writefile(['x'], 'Xdir with spaces/quoted"file')
   term ls Xdir\ with\ spaces/quoted\"file
   call WaitForAssert({-> assert_match('quoted"file', term_getline('', 1))})
-  call term_wait('')
+  " make sure the job has finished
+  call WaitForAssert({-> assert_match('finish', term_getstatus(bufnr()))})
 
   call delete('Xdir with spaces', 'rf')
   bwipe

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    304,
 /**/
     303,
 /**/