systemed/iD — pull request #1925 by pnorman (2013-10-27 00:55:56+00:00)
Title: Distinguish between power=line and power=minor_line

Tagging distinguish between major power lines, which we map with
power=line and minor power lines, which we map with power=minor_line.

I couldn't find any power line icon presets in Maki, not even the one currently used in iD, so I'm using the same icon for minor_line even though it's not an ideal match.