In t/common.pl, we were attempting to let the user's installed
Test::More take precedence over ours, but getting thwarted by all
the test scripts' loading Test::More beforehand. Fixed. [Spotted
by Yitzchak Scott-Thoennes]In various test scripts, we were outputting some strings that
weren't strictly conformant with Test::Harness's expected input,
though it didn't actually cause problems. Now we're more
conformant, though not yet strict. [Spotted by Yitzchak
Scott-Thoennes]