tests: ensure regexes match to the end of the string
Regular expressions in the test suite are currently written assuming
that you need a trailing ".*" to avoid matching to the end.
Instead of matching regular expressions using "^pattern", this patch
makes matching more restrictive by matching "^pattern$".
[ original upstream message ]
tests: don't match blank output lines as regexes in unified tests
Currently, the following unified test will pass:
$ echo foo
A blank output line (a line containing just two spaces) will match any
output.
The patch modifies the unified test runner to ignore empty strings
strings when do regular expression matching.
[ original upstream message ]