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-rw-r--r--lib/redmine/export/csv.rb2
-rw-r--r--lib/redmine/export/pdf.rb2
-rw-r--r--lib/redmine/export/pdf/issues_pdf_helper.rb2
-rw-r--r--lib/redmine/export/pdf/wiki_pdf_helper.rb2
4 files changed, 8 insertions, 0 deletions
diff --git a/lib/redmine/export/csv.rb b/lib/redmine/export/csv.rb
index b0d48ef6f..92da0cff5 100644
--- a/lib/redmine/export/csv.rb
+++ b/lib/redmine/export/csv.rb
@@ -1,4 +1,6 @@
# encoding: utf-8
+# frozen_string_literal: false
+
#
# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
diff --git a/lib/redmine/export/pdf.rb b/lib/redmine/export/pdf.rb
index ff383d108..28627c2a4 100644
--- a/lib/redmine/export/pdf.rb
+++ b/lib/redmine/export/pdf.rb
@@ -1,4 +1,6 @@
# encoding: utf-8
+# frozen_string_literal: false
+
#
# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
diff --git a/lib/redmine/export/pdf/issues_pdf_helper.rb b/lib/redmine/export/pdf/issues_pdf_helper.rb
index 3a6183893..5acdeffa9 100644
--- a/lib/redmine/export/pdf/issues_pdf_helper.rb
+++ b/lib/redmine/export/pdf/issues_pdf_helper.rb
@@ -1,4 +1,6 @@
# encoding: utf-8
+# frozen_string_literal: false
+
#
# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
diff --git a/lib/redmine/export/pdf/wiki_pdf_helper.rb b/lib/redmine/export/pdf/wiki_pdf_helper.rb
index 206820e54..5d325f2fd 100644
--- a/lib/redmine/export/pdf/wiki_pdf_helper.rb
+++ b/lib/redmine/export/pdf/wiki_pdf_helper.rb
@@ -1,4 +1,6 @@
# encoding: utf-8
+# frozen_string_literal: false
+
#
# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang