Ruby AST: Fix method visibility
Ruby AST specs: Fix indentation
YCP AST specs: Remove unused fixtures
Emit |Yast.import| without parens

It's a bit cleaner and it is consistent with how similar method calls
(e.g. |require|) are usually written.
Emit |Yast.import| without parens

It's a bit cleaner and it is consistent with how similar method calls
(e.g. |require|) are usually written.
Ruby AST: Remove dead code
bin/y2r: Print options-related error message to stderr, not stdout
bin/y2r: Exit with status 1 on options-related error
bin/y2r: Better error handling

In case of expected exceptions, don't print the stack trace, just the
exception message.
bin/y2r: Improve the options description
Adapt to yast-core comment-related bug fix

See https://github.com/yast/yast-core/issues/29.