The initial "\n\t" to properly indent a searcher message is being added
by 'findloader' when building the error message, instead of being
included in the original message by each searcher itself.

Instead of being a copy of 'lib2.so', 'lib2-v2.so' has its own source
file ('lib22.c'), so that the test can distinguish both libraries.

The function 'require' returns the *loader data* as a second result.
For file searchers, this data is the path where they found the module.

From the point of view of 'git', all names are relative to the root
directory of the project. So, file names in '$Id:' also should be
relative to that directory: the proper name for test file 'all.lua'
is 'testes/all.lua'.