This change broke spec filtering in Karma by changing the format of the
`spec` query parameter. Although karma-jasmine-html-reporter uses
jasmine-core's HtmlSpecFilter, karm-jasmine provides its own spec filter
that interprets the query parameters itself.
This feature may be reintroduced in 6.0 as a breaking change.
This reverts commit 8309416cb2.
dbc1f9244e