The type signatures of these methods make them easy to mix up. `require.Error()` asserts that there is any non-nil error -- the last parameter is an optional human-readable message to log when the assertion fails. `require.EqualError()` asserts that there is a non-nil error _and_ that when you call `err.Error()`, the string matches the expected value. It also takes an additional optional parameter to specify the log message.
Signed-off-by: Matt Moyer <moyerm@vmware.com>
