c100bb6242
This breaks each call out onto its own line, so that it's much easier to
see where each call starts and how they differ. E.g. previously the output
would be:
Expected spy foo to have been called with [ 'bar', 'baz', 'qux' ] but actual calls were [ [ 42, 'wibble' ], [ 'bar' 'qux' ], [ 'grault '] ]
Now it's:
Expected spy foo to have been called with:
[ 'bar', 'baz', 'qux' ]
but actual calls were:
[ 42, 'wibble' ],
[ 'bar' 'qux' ],
[ 'grault '].