fix build with sphinx4 (#1977317)

use rawstring in conf.py (already in ghc-9)

ghc-userguide-sphinx4.patch

@@ -0,0 +1,11 @@
+--- ghc-8.8.4/docs/users_guide/conf.py~	2020-07-09 00:43:03.000000000 +0800
++++ ghc-8.8.4/docs/users_guide/conf.py	2021-07-01 00:09:03.537324304 +0800
+@@ -77,7 +77,7 @@
+ latex_elements = {
+     'inputenc': '',
+     'utf8extra': '',
+-    'preamble': '''
++    'preamble': r'''
+ \usepackage{fontspec}
+ \usepackage{makeidx}
+ \setsansfont{DejaVu Sans}

ghc.spec

@@ -49,7 +49,7 @@ Version: 8.8.4
 # - release can only be reset if *all* library versions get bumped simultaneously
 #   (sometimes after a major release)
 # - minor release numbers for a branch should be incremented monotonically
-Release: 110%{?dist}
+Release: 111%{?dist}
 Summary: Glasgow Haskell Compiler
 
 License: BSD and HaskellReport
@@ -68,6 +68,8 @@ Patch2:  ghc-Cabal-install-PATH-warning.patch
 Patch3: ghc-gen_contents_index-nodocs.patch
 # https://phabricator.haskell.org/rGHC4eebc8016f68719e1ccdf460754a97d1f4d6ef05
 Patch6: ghc-8.6.3-sphinx-1.8.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=1977317
+Patch7: ghc-userguide-sphinx4.patch
 
 # Arch dependent patches
 
@@ -312,6 +314,7 @@ packages to be automatically installed too.
 
 %patch2 -p1 -b .orig
 %patch6 -p1 -b .orig
+%patch7 -p1 -b .orig
 
 rm -r libffi-tarballs
 
@@ -655,6 +658,9 @@ env -C %{ghc_html_libraries_dir} ./gen_contents_index
 
 
 %changelog
+* Wed Jun 30 2021 Jens Petersen <petersen@redhat.com> - 8.8.4-111
+- fix build with sphinx4 (#1977317)
+
 * Tue May 25 2021 Jens Petersen <petersen@redhat.com> - 8.8.4-110
 - ghc-compiler now requires ghc-filesystem for html docdirs