Switch converter to return the TBPL formatted string for comparison
Switch converter to return the TBPL formatted string for comparison

This saves us from passing tuples around and makes it more obvious where
the string comparison is happening.

edmorley/treeherder,KWierso/treeherder,edmorley/treeherder,KWierso/treeherder,KWierso/treeherder,edmorley/treeherder,KWierso/treeherder,edmorley/treeherder