Ruby lexer does not detect defined? as a keyword for parenthesized argument

[ashmaroli]

Name of the lexer

ruby

Code sample

raise "Hellfire" unless defined?(Rouge)
state :peace do
  load 'rouge'
end

Screenshots

Additional context

Unlike other keywords which are usually flanked by whitespace, defined? is mostly used with parentheses.

[ashmaroli]

Note: super is another keyword that may also be called with parenthesis, albeit resulting in different semantics.