Update to Python 3.9.0a6

Sed a SyntaxError out not to bother with a patch that would most likely go away in a7.

No other patch changes.

python39.spec

@@ -14,7 +14,7 @@ URL: https://www.python.org/
 #  WARNING  When rebasing to a new Python version,
 #           remember to update the python3-docs package as well
 %global general_version %{pybasever}.0
-%global prerel a5
+%global prerel a6
 %global upstream_version %{general_version}%{?prerel}
 Version: %{general_version}%{?prerel:~%{prerel}}
 Release: 1%{?dist}
@@ -626,6 +626,10 @@ rm Lib/ensurepip/_bundled/*.whl
 %patch274 -p1
 %patch328 -p1
 
+# https://bugs.python.org/issue40431
+# https://github.com/python/cpython/pull/19777
+sed -i 's/ else"/ else "/' Lib/turtledemo/__main__.py
+
 
 # Remove files that should be generated by the build
 # (This is after patching, so that we can use patches directly from upstream)
@@ -870,6 +874,7 @@ install -d -m 0755 %{buildroot}%{_prefix}/lib/python%{pybasever}/site-packages/_
 install -D -m 0644 Lib/idlelib/Icons/idle_16.png %{buildroot}%{_datadir}/icons/hicolor/16x16/apps/idle3.png
 install -D -m 0644 Lib/idlelib/Icons/idle_32.png %{buildroot}%{_datadir}/icons/hicolor/32x32/apps/idle3.png
 install -D -m 0644 Lib/idlelib/Icons/idle_48.png %{buildroot}%{_datadir}/icons/hicolor/48x48/apps/idle3.png
+install -D -m 0644 Lib/idlelib/Icons/idle_256.png %{buildroot}%{_datadir}/icons/hicolor/256x256/apps/idle3.png
 desktop-file-install --dir=%{buildroot}%{_datadir}/applications %{SOURCE10}
 
 # Install and validate appdata file
@@ -1569,6 +1574,9 @@ CheckPython optimized
 # ======================================================
 
 %changelog
+* Tue Apr 28 2020 Miro Hrončok <mhroncok@redhat.com> - 3.9.0~a6-1
+- Update to Python 3.9.0a6
+
 * Tue Mar 24 2020 Miro Hrončok <mhroncok@redhat.com> - 3.9.0~a5-1
 - Update to Python 3.9.0a5