Fix typos in Doc/library/email.generator.rst documentation (GH-13539)

diff --git a/Doc/library/email.generator.rst b/Doc/library/email.generator.rst
index c09ae8c..2d9bae6 100644
--- a/Doc/library/email.generator.rst
+++ b/Doc/library/email.generator.rst
@@ -36,7 +36,7 @@
 Content Transfer Encoding techniques for encoding email messages for transport
 over channels that are not "8 bit clean".
 
-To accomodate reproducible processing of SMIME-signed messages
+To accommodate reproducible processing of SMIME-signed messages
 :class:`Generator` disables header folding for message parts of type
 ``multipart/signed`` and all subparts.