diff --git a/lib/lrama/parser.rb b/lib/lrama/parser.rb
index 328de1cf..843090ae 100644
--- a/lib/lrama/parser.rb
+++ b/lib/lrama/parser.rb
@@ -1,14 +1,13 @@
 #
 # DO NOT MODIFY!!!!
-# This file is automatically generated by Racc 1.7.1
-# from Racc grammar file "".
+# This file is automatically generated by Racc 1.7.2
+# from Racc grammar file "parser.y".
 #
 
 ###### racc/parser.rb begin
 unless $".find {|p| p.end_with?('/racc/parser.rb')}
 $".push "#{__dir__}/racc/parser.rb"
 self.class.module_eval(<<'...end racc/parser.rb/module_eval...', 'racc/parser.rb', 1)
-# frozen_string_literal: false
 #--
 # Copyright (c) 1999-2006 Minero Aoki
 #
@@ -22,17 +21,6 @@
 
 unless $".find {|p| p.end_with?('/racc/info.rb')}
 $".push "#{__dir__}/racc/info.rb"
-#--
-#
-#
-#
-# Copyright (c) 1999-2006 Minero Aoki
-#
-# This program is free software.
-# You can distribute/modify this program under the same terms of ruby.
-# see the file "COPYING".
-#
-#++
 
 module Racc
   VERSION   = '1.7.1'
@@ -84,10 +72,12 @@ class ParseError < StandardError; end
 # [-v, --verbose]
 #   verbose mode. create +filename+.output file, like yacc's y.output file.
 # [-g, --debug]
-#   add debug code to parser class. To display debuggin information,
+#   add debug code to parser class. To display debugging information,
 #   use this '-g' option and set @yydebug true in parser class.
 # [-E, --embedded]
 #   Output parser which doesn't need runtime files (racc/parser.rb).
+# [-F, --frozen]
+#   Output parser which declares frozen_string_literals: true
 # [-C, --check-only]
 #   Check syntax of racc grammar file and quit.
 # [-S, --output-status]
@@ -566,7 +556,7 @@ def _racc_do_reduce(arg, act)
     #
     # If this method returns, parsers enter "error recovering mode".
     def on_error(t, val, vstack)
-      raise ParseError, sprintf("\nparse error on value %s (%s)",
+      raise ParseError, sprintf("parse error on value %s (%s)",
                                 val.inspect, token_to_str(t) || '?')
     end