line cleaning can be even smoother

See #150, release log:

• 5f80051 by @yegor256: #150 more info
• 130ddea by @yegor256: #150 more commander configs
• b4b1c7f by @yegor256: #150 clean end of line only
• 526224c by @yegor256: #149 test verbose too

Released by Rultor 1.75.0, see build log