Improve disabled tag error output

lib/liquid/locales/en.yml

@@ -26,4 +26,4 @@
     argument:
       include: "Argument error in tag 'include' - Illegal template name"
     disabled:
-      tag: "usage has been disabled in this context."
+      tag: "usage is not allowed in this context"

lib/liquid/tags/render.rb

@@ -3,7 +3,7 @@
 module Liquid
   class Render < Tag
     SYNTAX = /(#{QuotedString})#{QuotedFragment}*/o
-    DISABLED_TAGS = %w(include)
+    DISABLED_TAGS = %w(include).freeze
 
     attr_reader :template_name_expr, :attributes
 

test/integration/registers/disabled_tags_test.rb

@@ -23,13 +23,13 @@ class DisabledTagsTest < Minitest::Test
 
   def test_disables_raw
     with_custom_tag('disable', DisableRaw) do
-      assert_template_result 'raw usage has been disabled in this context.foo', '{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}'
+      assert_template_result 'raw usage is not allowed in this contextfoo', '{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}'
     end
   end
 
   def test_disables_echo_and_raw
     with_custom_tag('disable', DisableRawEcho) do
-      assert_template_result 'raw usage has been disabled in this context.echo usage has been disabled in this context.', '{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}'
+      assert_template_result 'raw usage is not allowed in this contextecho usage is not allowed in this context', '{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}'
     end
   end
 end

test/integration/tags/render_tag_test.rb

@@ -153,7 +153,7 @@ class RenderTagTest < Minitest::Test
       'test_include' => '{% include "foo" %}'
     )
 
-    assert_template_result 'include usage has been disabled in this context.', '{% render "test_include" %}'
+    assert_template_result 'include usage is not allowed in this context', '{% render "test_include" %}'
   end
 
   def test_includes_will_not_render_inside_nested_sibling_tags
@@ -163,6 +163,6 @@ class RenderTagTest < Minitest::Test
       'test_include' => '{% include "foo" %}'
     )
 
-    assert_template_result 'include usage has been disabled in this context.include usage has been disabled in this context.', '{% render "nested_render_with_sibling_include" %}'
+    assert_template_result 'include usage is not allowed in this contextinclude usage is not allowed in this context', '{% render "nested_render_with_sibling_include" %}'
   end
 end