Report call and args like other error messages

src/spectator/mocks/double.cr

@@ -127,7 +127,7 @@ module Spectator
       Log.debug { "Got undefined method `{{call.name}}({{*call.args}}{% if call.named_args %}{% unless call.args.empty? %}, {% end %}{{*call.named_args}}{% end %}){% if call.block %} { ... }{% end %}`" }
       args = ::Spectator::Arguments.capture({{call.args.splat(", ")}}{% if call.named_args %}{{*call.named_args}}{% end %})
       call = ::Spectator::MethodCall.new({{call.name.symbolize}}, args)
-      raise ::Spectator::UnexpectedMessage.new("#{_spectator_stubbed_name} received unexpected message :{{call.name}} with #{args}")
+      raise ::Spectator::UnexpectedMessage.new("#{_spectator_stubbed_name} received unexpected message #{call}")
       nil # Necessary for compiler to infer return type as nil. Avoids runtime "can't execute ... `x` has no type errors".
     end
   end