patch 7.4.1571
Problem:    No test for ":help".
Solution:   Add a test for what 7.4.1568 fixed. (Higashi Higashi)
diff --git a/src/testdir/test_alot.vim b/src/testdir/test_alot.vim
index 55502ba..f4a1450 100644
--- a/src/testdir/test_alot.vim
+++ b/src/testdir/test_alot.vim
@@ -9,6 +9,7 @@
 source test_feedkeys.vim
 source test_file_perm.vim
 source test_glob2regpat.vim
+source test_help_tagjump.vim
 source test_join.vim
 source test_lispwords.vim
 source test_menu.vim
diff --git a/src/testdir/test_help_tagjump.vim b/src/testdir/test_help_tagjump.vim
new file mode 100644
index 0000000..d1e9ad4
--- /dev/null
+++ b/src/testdir/test_help_tagjump.vim
@@ -0,0 +1,18 @@
+" Tests for :help! {subject}
+
+func Test_help_tagjump()
+  help
+  call assert_equal("help", &filetype)
+  call assert_true(getline('.') =~ '\*help.txt\*')
+  helpclose
+
+  exec "help! ('textwidth'"
+  call assert_equal("help", &filetype)
+  call assert_true(getline('.') =~ "\\*'textwidth'\\*")
+  helpclose
+
+  exec "help! ('buflisted'),"
+  call assert_equal("help", &filetype)
+  call assert_true(getline('.') =~ "\\*'buflisted'\\*")
+  helpclose
+endfunc
diff --git a/src/version.c b/src/version.c
index f6b1f3b..944ffea 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1571,
+/**/
     1570,
 /**/
     1569,