credit xray/xarray team

wholmgren · wholmgren · commit 3cc64ae4cecc · 2016-01-14T16:48:24.000-07:00
diff --git a/pvlib/test/__init__.py b/pvlib/test/__init__.py
@@ -1,3 +1,6 @@
+# the has/skip patterns closely follow the examples set by
+# the xray/xarray project
+
 import sys
 
 try:
