Fix line numbers was not shown on warnings of indecies

tests/test_build_html.py

@@ -31,6 +31,7 @@ http://www.python.org/logo.png
 reading included file u'.*?wrongenc.inc' seems to be wrong, try giving an \
 :encoding: option\\n?
 %(root)s/includes.txt:4: WARNING: download file not readable: .*?nonexisting.png
+(%(root)s/markup.txt:351: WARNING: invalid single index entry u'')?
 (%(root)s/undecodable.txt:3: WARNING: undecodable source characters, replacing \
 with "\\?": b?'here: >>>(\\\\|/)xbb<<<'
 )?"""
@@ -39,9 +40,6 @@ HTML_WARNINGS = ENV_WARNINGS + """\
 %(root)s/images.txt:20: WARNING: no matching candidate for image URI u'foo.\\*'
 %(root)s/footnote.txt:60: WARNING: citation not found: missing
 %(root)s/markup.txt:158: WARNING: unknown option: &option
-%(root)s/markup.txt:: WARNING: invalid single index entry u''
-%(root)s/markup.txt:: WARNING: invalid pair index entry u''
-%(root)s/markup.txt:: WARNING: invalid pair index entry u'keyword; '
 """
 
 if PY3:
@@ -376,7 +374,7 @@ def check_extra_entries(outdir):
     assert (outdir / 'robots.txt').isfile()
 
 
-@gen_with_app(buildername='html',
+@gen_with_app(buildername='html', freshenv=True,  # use freshenv to check warnings
               confoverrides={'html_context.hckey_co': 'hcval_co'},
               tags=['testtag'])
 def test_html_output(app, status, warning):

tests/test_build_latex.py

@@ -27,15 +27,13 @@ LATEX_WARNINGS = ENV_WARNINGS + """\
 %(root)s/markup.txt:158: WARNING: unknown option: &option
 %(root)s/footnote.txt:60: WARNING: citation not found: missing
 %(root)s/images.txt:20: WARNING: no matching candidate for image URI u'foo.\\*'
-WARNING: invalid pair index entry u''
-WARNING: invalid pair index entry u'keyword; '
 """
 
 if PY3:
     LATEX_WARNINGS = remove_unicode_literals(LATEX_WARNINGS)
 
 
-@with_app(buildername='latex')
+@with_app(buildername='latex', freshenv=True)  # use freshenv to check warnings
 def test_latex(app, status, warning):
     LaTeXTranslator.ignore_missing_images = True
     app.builder.build_all()
@@ -94,7 +92,7 @@ def test_latex(app, status, warning):
         os.chdir(cwd)
 
 
-@with_app(buildername='latex',
+@with_app(buildername='latex', freshenv=True,  # use freshenv to check warnings
           confoverrides={'latex_documents': [
               ('contents', 'SphinxTests.tex', 'Sphinx Tests Documentation',
                'Georg Brandl \\and someone else', 'howto'),

tests/test_build_texinfo.py

@@ -33,7 +33,7 @@ if PY3:
     TEXINFO_WARNINGS = remove_unicode_literals(TEXINFO_WARNINGS)
 
 
-@with_app('texinfo')
+@with_app('texinfo', freshenv=True)  # use freshenv to check warnings
 def test_texinfo(app, status, warning):
     TexinfoTranslator.ignore_missing_images = True
     app.builder.build_all()