Remove useless line

From de16daf4de8b0092690ff2b028108cdb395b762c.
Don't use parentheses around the condition of an if/unless/while/until
Prefer `&&` and `||` to `and` and `or`

Finish off 9cda432abe93fd29bce310f4489e3321417cd7bc.
Fix block alignment
Use Kernel#loop with break rather than begin/end/until(or while)
Refactor get_indicator to use case statement