Fixes the errors with use of asyncio in docrepr/tests/test_output.py:
     
>       await compare_screenshots(test_id, url)
E       TypeError: 'coroutine' object is not callable

--- a/conftest.py
+++ b/conftest.py
@@ -65,7 +65,7 @@ def _open_browser(url):
 
 
 @pytest.fixture
-async def compare_screenshots(request):
+def compare_screenshots(request):
     """Run visual regression test on the output."""
     async def _compare_screenshots(test_id, url):
         if (request.config.getoption(COMPARE_SCREENSHOTS_OPTION) or
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<tr><td><span title='2018-11-20 22:40:44 +0530'>2018-11-20</span></td><td><a href='/guix/commit/gnu/services/games.scm?id=662e2285f502b65600b0b5a12c040d050be8999d'>services: wesnothd: Run as wesnothd user and group.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/games.scm (wesnothd-shepherd-service): Run as wesnothd user and
group.
</span></span></td><td>Arun Isaac</td></tr>
<tr><td><span title='2018-05-14 20:15:28 +0530'>2018-05-14</span></td><td><a href='/guix/commit/gnu/services/games.scm?id=f93c7a89797667db073b1ddbb0fbbea41f16bf33'>gnu: services: Fix wesnothd-configuration? symbol export.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/games.scm: Export wesnothd-configuration?, not the
non-existent wesnoth-configuration?.
</span></span></td><td>Arun Isaac</td></tr>
<tr><td><span title='2018-02-09 14:55:17 +0530'>2018-02-09</span></td><td><a href='/guix/commit/gnu/services/games.scm?id=a76acfd3f5ea6cced10af5a191d057f29b87f277'>gnu: services: Add wesnothd service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/games.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Game Services): Document the service.
</span></span></td><td>Arun Isaac</td></tr>