dev-python/ruamel-yaml-0.16.13-r1: skip test_collections_deprecation on pypy3

This only got deprecated in Python 3.7 and our pypy is 3.6-compatible.

Closes: https://bugs.gentoo.org/775473
Signed-off-by: Marek Szuba <marecki@gentoo.org>

dev-python/ruamel-yaml/files/ruamel-yaml-0.16.13-pypy3_collection_deprecation.patch

@@ -0,0 +1,22 @@
+Note that this implicitly assumes pypy3 to be compatible with CPython 3.6.
+The test could in principle be more robust - but between 3.7 support
+in PyPy is still being alpha-grade and the fact there will be many more
+serious issues with switching the Gentoo pypy3 target to those versions,
+why bother for now.
+
+--- a/_test/test_deprecation.py
++++ b/_test/test_deprecation.py
+@@ -2,11 +2,12 @@
+ 
+ from __future__ import print_function
+ 
++import platform
+ import sys
+ import pytest  # NOQA
+ 
+ 
+-@pytest.mark.skipif(sys.version_info < (3, 7) or sys.version_info >= (3, 9),
++@pytest.mark.skipif(platform.python_implementation() == 'PyPy' or sys.version_info < (3, 7) or sys.version_info >= (3, 9),
+                     reason='collections not available?')
+ def test_collections_deprecation():
+     with pytest.warns(DeprecationWarning):

dev-python/ruamel-yaml/ruamel-yaml-0.16.13-r1.ebuild

@@ -26,6 +26,10 @@ BDEPEND="test? (
 	dev-python/ruamel-std-pathlib[${PYTHON_USEDEP}]
 )"
 
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.16.13-pypy3_collection_deprecation.patch
+)
+
 S="${WORKDIR}"/${MY_P}
 
 distutils_enable_tests pytest