refresh the edit window when exiting from the help viewer

Backport of an upstream fix suggested by Benno Schulenberg at
https://lists.gnu.org/archive/html/nano-devel/2019-11/msg00021.html

nano-4.3-display-refersh.patch

@@ -0,0 +1,46 @@
+From 0f5e94bd80c1cf703b789747262c787b72c4e504 Mon Sep 17 00:00:00 2001
+From: Benno Schulenberg <bensberg@telfort.nl>
+Date: Sat, 23 Nov 2019 20:22:31 +0100
+Subject: [PATCH] display: do refresh the edit window when exiting from the
+ help viewer
+
+There are several cases (searching, replacing, spell checking, ...)
+where exiting from the help viewer does NOT return the user to the
+editing of the buffer.
+
+This fixes https://savannah.gnu.org/bugs/?57295.
+
+Bug existed since version 4.3, commit 5817e83e.
+
+Upstream-commit: ec9a11c76136f8968040e9d63f81f773826f46d6
+Signed-off-by: Kamil Dudka <kdudka@redhat.com>
+---
+ src/help.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/help.c b/src/help.c
+index 9591008..db3275e 100644
+--- a/src/help.c
++++ b/src/help.c
+@@ -247,7 +247,6 @@ void do_help(void)
+ 	inhelp = FALSE;
+ 
+ 	curs_set(0);
+-	refresh_needed = TRUE;
+ 
+ 	if (ISSET(NO_HELP)) {
+ 		currmenu = oldmenu;
+@@ -262,7 +261,10 @@ void do_help(void)
+ 		browser_refresh();
+ 	else
+ #endif
++	{
+ 		titlebar(NULL);
++		edit_refresh();
++	}
+ }
+ 
+ /* Allocate space for the help text for the current menu, and concatenate
+-- 
+2.20.1
+

nano.spec

@@ -1,7 +1,7 @@
 Summary:         A small text editor
 Name:            nano
 Version:         4.3
-Release:         2%{?dist}
+Release:         3%{?dist}
 License:         GPLv3+
 URL:             https://www.nano-editor.org
 Source:          https://www.nano-editor.org/dist/latest/%{name}-%{version}.tar.xz
@@ -17,6 +17,9 @@ BuildRequires:   sed
 BuildRequires:   texinfo
 Conflicts:       filesystem < 3
 
+# refresh the edit window when exiting from the help viewer
+Patch1: nano-4.3-display-refersh.patch
+
 %description
 GNU nano is a small and friendly text editor.
 
@@ -64,6 +67,9 @@ install -m 0644 ./nanorc %{buildroot}%{_sysconfdir}/nanorc
 %{_datadir}/nano
 
 %changelog
+* Wed Nov 27 2019 Kamil Dudka <kdudka@redhat.com> - 4.3-3
+- refresh the edit window when exiting from the help viewer
+
 * Thu Jul 25 2019 Fedora Release Engineering <releng@fedoraproject.org> - 4.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild