In Ruby one can invoke methods with or without parentheses:
some_method(arg1, arg2)
some_method arg1, arg2
ruby-mode currently does not handle properly the indentation of calls without parentheses that span several lines:
# indented properly in 24.3
some_method(arg1,
arg2)
# not indented at all in 24.3
some_method arg1,
arg2
Ideally the second code example would be indented by ruby-mode like this:
some_method arg1,
arg2