Fix #6744: support for seealso directive should be via an environment

tests/test_build_latex.py

@@ -135,6 +135,17 @@ def test_writer(app, status, warning):
 
     assert 'Footnotes' not in result
 
+    assert ('\\begin{sphinxseealso}{See also}\n\n'
+            '\\sphinxAtStartPar\n'
+            'something, something else, something more\n'
+            '\\begin{description}\n'
+            '\\sphinxlineitem{\\sphinxhref{http://www.google.com}{Google}}\n'
+            '\\sphinxAtStartPar\n'
+            'For everything.\n'
+            '\n'
+            '\\end{description}\n'
+            '\n\n\\end{sphinxseealso}\n\n' in result)
+
 
 @pytest.mark.sphinx('latex', testroot='warnings', freshenv=True)
 def test_latex_warnings(app, status, warning):