Update pytest to skip when locale unsupported

Author: devRD

lib/matplotlib/tests/test_ticker.py

@@ -1449,7 +1449,6 @@ def test_latex(self, is_latex, usetex, expected):
             assert fmt.format_pct(50, 100) == expected
 
 
-@pytest.mark.xfail
 def test_locale_comma():
     currentLocale = locale.getlocale()
     try:
@@ -1462,6 +1461,8 @@ def test_locale_comma():
         fmt = ',$\\mathdefault{,%1.1f},$'
         x = ticks._format_maybe_minus_and_locale(fmt, 0.5)
         assert x == ',$\\mathdefault{,0{,}5},$'
+    except locale.Error:
+        pytest.skip("Locale fy_DE.UTF-8 is not supported on this machine")
     finally:
         locale.setlocale(locale.LC_ALL, currentLocale)