Change variables handling for compatibility

Author: aycabta

lib/irb/ruby-lex.rb

@@ -201,14 +201,14 @@ def lex
     code = @line + (line.nil? ? '' : line)
     code.gsub!(/\s*\z/, '').concat("\n")
     @tokens = ripper_lex_without_warning(code)
-    @continue = process_continue(@tokens)
-    @code_block_open = check_code_block(code, @tokens)
-    @indent = process_nesting_level(@tokens)
-    @ltype = process_literal_type(@tokens)
+    @continue = process_continue
+    @code_block_open = check_code_block(code)
+    @indent = process_nesting_level
+    @ltype = process_literal_type
     line
   end
 
-  def process_continue(tokens)
+  def process_continue(tokens = @tokens)
     # last token is always newline
     if tokens.size >= 2 and tokens[-2][1] == :on_regexp_end
       # end of regexp literal
@@ -228,7 +228,7 @@ def process_continue(tokens)
     false
   end
 
-  def check_code_block(code, tokens)
+  def check_code_block(code, tokens = @tokens)
     return true if tokens.empty?
     if tokens.last[1] == :on_heredoc_beg
       return true
@@ -321,7 +321,7 @@ def check_code_block(code, tokens)
     false
   end
 
-  def process_nesting_level(tokens)
+  def process_nesting_level(tokens = @tokens)
     indent = 0
     in_oneliner_def = nil
     tokens.each_with_index { |t, index|
@@ -574,7 +574,7 @@ def check_string_literal(tokens)
     start_token.last.nil? ? '' : start_token.last
   end
 
-  def process_literal_type(tokens)
+  def process_literal_type(tokens = @tokens)
     start_token = check_string_literal(tokens)
     case start_token[1]
     when :on_tstring_beg