- Add py314.patch to fix tests with Python 3.14

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-graphviz?expand=0&rev=40

py314.patch

@@ -0,0 +1,13 @@
+Index: graphviz-0.21/tests/test_quoting.py
+===================================================================
+--- graphviz-0.21.orig/tests/test_quoting.py
++++ graphviz-0.21/tests/test_quoting.py
+@@ -17,7 +17,7 @@ def test_deprecated_escape(recwarn, char
+     assert len(recwarn) == 1
+     w = recwarn.pop(DeprecationWarning if sys.version_info < (3, 12)
+                     else SyntaxWarning)
+-    assert str(w.message).startswith('invalid escape sequence')
++    assert 'invalid escape sequence' in str(w.message)
+ 
+     assert escape == f'\\{char}'
+     assert quoting.quote(escape) == f'"\\{char}"'