Problems with pie chart and symbol '-'

[jorfermo]

Hello

I'm using a pie chart filtering by the tag syslog_category.

This field has codes like this:

OSAPI-4-MSGQ_SEND_FAILED

The piechart is chopping the code in 3 parts OSAPI, 4, MSGQ_SEND_FAILED so the results displayed are not correct. It seems that there's some problems with the symbol '-'

[bobrik]

I'm gonna make a chain of issues like this: #618.

[davux]

Not a bug. This doesn't come from Kibana but from default Elasticsearch analyzer.