Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticMediaWiki  8517a312de33fdb6dee5148eb490655134ccea90

\SMW\AggregatablePrinter use an explicit indicator to aggregate numbers

We do not assume a specific grouping preference, rather expect an explicit
decision on how numbers should be aggregated.

## Parameter
|aggregation=property (subject by default) to determine grouping preference

Change-Id: I6cce1067cc3db5892d007cf170bd60d6d6927bdf