add missing frozen string literal comment on convert, load, and rx files

3 files changed, 3 insertions, 0 deletions

diff --git a/lib/asciidoctor/convert.rb b/lib/asciidoctor/convert.rb
index d4382821..894f5999 100644
--- a/lib/asciidoctor/convert.rb
+++ b/lib/asciidoctor/convert.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Asciidoctor
   class << self
     # Public: Parse the AsciiDoc source input into an Asciidoctor::Document and
diff --git a/lib/asciidoctor/load.rb b/lib/asciidoctor/load.rb
index 3e8fc810..866a10f3 100644
--- a/lib/asciidoctor/load.rb
+++ b/lib/asciidoctor/load.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Asciidoctor
   class << self
     # Public: Parse the AsciiDoc source input into a {Document}
diff --git a/lib/asciidoctor/rx.rb b/lib/asciidoctor/rx.rb
index fd378748..423ff902 100644
--- a/lib/asciidoctor/rx.rb
+++ b/lib/asciidoctor/rx.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Asciidoctor
   # A collection of regular expression constants used by the parser. (For speed, these are not defined in the Rx module,
   # but rather directly in the Asciidoctor module).