Fix up Ruby 2.7.0 build

Author: kddnewton

test/fixtures/def.rb

@@ -29,13 +29,3 @@ def foo( # comment
 =end
 a
 end
-%
-def a()
-=begin
-=end
-=1
--
-def a() =
-=begin
-=end
-  1

test/fixtures/def_endless.rb

@@ -22,3 +22,13 @@ def self.foo = bar baz
 end
 
 def foo? = true
+%
+def a()
+=begin
+=end
+=1
+-
+def a() =
+=begin
+=end
+  1