@@ -156,7 +156,13 @@ Currently the email package provides only one concrete content manager,
156156 :exc: `ValueError `.
157157
158158 * For ``str `` objects, if *cte * is not set use heuristics to
159- determine the most compact encoding.
159+ determine the most compact encoding. Prior to encoding,
160+ :meth: `str.splitlines ` is used to normalize all line boundaries,
161+ ensuring that each line of the payload is terminated by the
162+ current policy's :data: `~email.policy.Policy.linesep ` property
163+ (even if the original string did not end with one).
164+ * For ``bytes `` objects, *cte * is taken to be base64 if not set,
165+ and the aforementioned newline translation is not performed.
160166 * For :class: `~email.message.EmailMessage `, per :rfc: `2046 `, raise
161167 an error if a *cte * of ``quoted-printable `` or ``base64 `` is
162168 requested for *subtype * ``rfc822 ``, and for any *cte * other than
@@ -191,13 +197,6 @@ Currently the email package provides only one concrete content manager,
191197 (distinguished from strings by having a ``name `` attribute), add the
192198 headers to *msg *.
193199
194- Note that this method will append a newline character to the end of strings,
195- if it wasn't passed already. For example, the following are equivalent ::
196-
197- msg = EmailMessage()
198- msg.set_content("hello")
199- msg.set_content("hello\n")
200-
201200
202201.. rubric :: Footnotes
203202
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