patch 8.0.1267: Test_swap_group may leave file behind

Problem:    Test_swap_group may leave file behind.
Solution:   Add a try/finally.

src/testdir/test_swap.vim

@@ -56,27 +56,29 @@ func Test_swap_group()
     throw 'Skipped: need at least two groups, got ' . string(groups)
   endif
 
-  call delete('Xtest')
-  split Xtest
-  call setline(1, 'just some text')
-  wq
-  if system('ls -l Xtest') !~ ' ' . groups[0] . ' \d'
-    throw 'Skipped: test file does not have the first group'
-  else
-    silent !chmod 640 Xtest
-    call system('chgrp ' . groups[1] . ' Xtest')
-    if system('ls -l Xtest') !~ ' ' . groups[1] . ' \d'
-      throw 'Skipped: cannot set second group on test file'
+  try
+    call delete('Xtest')
+    split Xtest
+    call setline(1, 'just some text')
+    wq
+    if system('ls -l Xtest') !~ ' ' . groups[0] . ' \d'
+      throw 'Skipped: test file does not have the first group'
     else
-      split Xtest
-      let swapname = substitute(execute('swapname'), '[[:space:]]', '', 'g')
-      call assert_match('Xtest', swapname)
-      " Group of swapfile must now match original file.
-      call assert_match(' ' . groups[1] . ' \d', system('ls -l ' . swapname))
+      silent !chmod 640 Xtest
+      call system('chgrp ' . groups[1] . ' Xtest')
+      if system('ls -l Xtest') !~ ' ' . groups[1] . ' \d'
+	throw 'Skipped: cannot set second group on test file'
+      else
+	split Xtest
+	let swapname = substitute(execute('swapname'), '[[:space:]]', '', 'g')
+	call assert_match('Xtest', swapname)
+	" Group of swapfile must now match original file.
+	call assert_match(' ' . groups[1] . ' \d', system('ls -l ' . swapname))
 
-      bwipe!
+	bwipe!
+      endif
     endif
-  endif
-
-  call delete('Xtest')
+  finally
+    call delete('Xtest')
+  endtry
 endfunc

src/testdir/test_undo.vim

@@ -190,6 +190,7 @@ func Test_undojoin_redo()
 endfunc
 
 func Test_undo_write()
+  call delete('Xtest')
   split Xtest
   call feedkeys("ione one one\<Esc>", 'xt')
   w!

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1267,
 /**/
     1266,
 /**/