Update UnsupportedPythonVersion docstring

xavfernandez · xavfernandez · commit b43fb54856df · 2016-10-27T18:43:59.000+02:00
diff --git a/pip/exceptions.py b/pip/exceptions.py
@@ -240,4 +240,5 @@ def hash_then_or(hash_name):
 
 
 class UnsupportedPythonVersion(InstallationError):
-    """Unsupported python version (related to PEP 345 Requires-Python)."""
+    """Unsupported python version according to Requires-Python package
+    metadata."""
