#14804: Remove [] around optional arguments with default values
diff --git a/Doc/library/email.generator.rst b/Doc/library/email.generator.rst
index f40869c..3be04a2 100644
--- a/Doc/library/email.generator.rst
+++ b/Doc/library/email.generator.rst
@@ -178,7 +178,7 @@
representing the part.
-.. class:: DecodedGenerator(outfp[, mangle_from_=True, maxheaderlen=78, fmt=None)
+.. class:: DecodedGenerator(outfp, mangle_from_=True, maxheaderlen=78, fmt=None)
This class, derived from :class:`Generator` walks through all the subparts of a
message. If the subpart is of main type :mimetype:`text`, then it prints the