Make recipients handling more readable
Add ending newline
Remove trailing whitespaces
Remove bundle install from spec task
Add note how to test specs
Remove deprecated expect raise_error(Error)

"Deprecate expect { }.not_to raise_error(SpecificErrorClass) or expect
{ }.not_to raise_error("some specific message"). Using these was prone
to hiding failures as they would allow any other error to pass."
Improve number spec readability
Fix number spec

Missing should method for sms_url in Elk::Number.allocate spec
Merge branch 'refactor'