Fix could not translate the content of meta directive (ref: #1734)

tests/roots/test-intl/contents.po

@@ -18,3 +18,9 @@ msgstr ""
 
 msgid "Table of Contents"
 msgstr "TABLE OF CONTENTS"
+
+msgid "testdata for i18n"
+msgstr "TESTDATA FOR I18N"
+
+msgid "i18n, sphinx, markup"
+msgstr "I18N, SPHINX, MARKUP"

tests/roots/test-intl/contents.txt

@@ -1,6 +1,10 @@
 CONTENTS
 ========
 
+.. meta::
+   :description: testdata for i18n
+   :keywords: i18n, sphinx, markup
+
 .. toctree::
    :maxdepth: 2
    :numbered:

tests/test_intl.py

@@ -360,6 +360,14 @@ def test_gettext_builder(app, status, warning):
 def test_html_builder(app, status, warning):
     app.builder.build_all()
 
+    # --- test for meta
+
+    result = (app.outdir / 'contents.html').text(encoding='utf-8')
+    expected_expr = '<meta content="TESTDATA FOR I18N" name="description" />'
+    yield assert_in, expected_expr, result
+    expected_expr = '<meta content="I18N, SPHINX, MARKUP" name="keywords" />'
+    yield assert_in, expected_expr, result
+
     # --- test for #955 cant-build-html-with-footnotes-when-using
 
     # expect no error by build