[Bug] bad condition in main()
[style] test all, test functions. [bad] const main

playing also with const x3 in main argv
[doc] documenting git tags etc  [bad]
[do] github tags standarized
[bad][wip] test case for main() bug with argv=1?

trying to reproduce in testcase the bug fixed
in da9c10cf49f0203552b8b79756de103f5908424b 1 parent 512e445
[bad][wip] refactoring testcase for main:  args

TODO: take vector of strings, run 3 testcases
[ok] testcase for main with 0 args etc works

shows bug for program name + 0 args
[bugfix] agaid the bug for 0 args, with testcase
[wip] refactoring testcases, dbg level and cerr

config class sent to each test
[ok] cmake options added
[ok] Version with editline lib