core/proc.rbs in rbs-3.5.0.pre.2 vs core/proc.rbs in rbs-3.5.0

@@ -600,10 +600,10 @@
   #     prc = proc{|x, y=42, *other|}
   #     prc.parameters(lambda: true)  #=> [[:req, :x], [:opt, :y], [:rest, :other]]
   #     prc = lambda{|x, y=42, *other|}
   #     prc.parameters(lambda: false) #=> [[:opt, :x], [:opt, :y], [:rest, :other]]
   #
-  def parameters: (lambda: boolish) -> ::Array[[ Symbol, Symbol ]]
+  def parameters: (?lambda: boolish) -> ::Array[[ Symbol, Symbol ]]
 
   # <!--
   #   rdoc-file=proc.c
   #   - prc.source_location  -> [String, Integer]
   # -->