Converts test execution counts to a string.
Converts a test case path to a string, separating adjacent elements by the colon (':'). An element of the path is quoted (as with show) when there is potential ambiguity.
Accumulates persistent lines (dropping progess lines) for return by runTestText. The accumulated lines are represented by a ShowS (String -> String) function whose first argument is the string to be appended to the accumulated report lines.