Use new optional argument style in email docs.
diff --git a/Doc/library/email.generator.rst b/Doc/library/email.generator.rst
index 0f5788a..2061f76 100644
--- a/Doc/library/email.generator.rst
+++ b/Doc/library/email.generator.rst
@@ -23,7 +23,7 @@
:mod:`email.generator` module:
-.. class:: Generator(outfp[, mangle_from_[, maxheaderlen]])
+.. class:: Generator(outfp, mangle_from_=True, maxheaderlen=78)
The constructor for the :class:`Generator` class takes a file-like object called
*outfp* for an argument. *outfp* must support the :meth:`write` method and be
@@ -47,7 +47,7 @@
The other public :class:`Generator` methods are:
- .. method:: flatten(msg[, unixfrom])
+ .. method:: flatten(msg, unixfrom=False)
Print the textual representation of the message object structure rooted at
*msg* to the output file specified when the :class:`Generator` instance
@@ -84,7 +84,7 @@
representing the part.
-.. class:: DecodedGenerator(outfp[, mangle_from_[, maxheaderlen[, fmt]]])
+.. 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