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-rw-r--r--sphinx/io.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/sphinx/io.py b/sphinx/io.py
index 8f048c7fc..8813cb3b6 100644
--- a/sphinx/io.py
+++ b/sphinx/io.py
@@ -166,8 +166,7 @@ class SphinxFileInput(FileInput):
if isinstance(parser_class, string_types):
parser_class = import_object(parser_class, 'source parser') # type: ignore # NOQA
return parser_class.supported
- else:
- return ('restructuredtext',)
+ return ('restructuredtext',)
data = FileInput.read(self)
if self.app: