[3.12] pythongh-121529: Document from_ parameter in _mboxMMDF public methods (pythonGH-121530) (python#131622)

pythongh-121529: Document `from_` parameter in `_mboxMMDF` public methods (pythonGH-121530)
(cherry picked from commit 557d2d2)

Co-authored-by: Sebb <[email protected]>

Author: miss-islington

Doc/library/mailbox.rst

@@ -482,12 +482,27 @@ Supported mailbox formats are Maildir, mbox, MH, Babyl, and MMDF.
    remarks:
 
 
-   .. method:: get_file(key)
+   .. method:: get_bytes(key, from_=False)
+
+      Note: This method has an extra parameter (*from_*) compared with other classes.
+      The first line of an mbox file entry is the Unix "From " line.
+      If *from_* is False, the first line of the file is dropped.
+
+   .. method:: get_file(key, from_=False)
 
       Using the file after calling :meth:`~Mailbox.flush` or
       :meth:`~Mailbox.close` on the :class:`!mbox` instance may yield
       unpredictable results or raise an exception.
 
+      Note: This method has an extra parameter (*from_*) compared with other classes.
+      The first line of an mbox file entry is the Unix "From " line.
+      If *from_* is False, the first line of the file is dropped.
+
+   .. method:: get_string(key, from_=False)
+
+      Note: This method has an extra parameter (*from_*) compared with other classes.
+      The first line of an mbox file entry is the Unix "From " line.
+      If *from_* is False, the first line of the file is dropped.
 
    .. method:: lock()
                unlock()
@@ -742,12 +757,22 @@ Supported mailbox formats are Maildir, mbox, MH, Babyl, and MMDF.
    remarks:
 
 
-   .. method:: get_file(key)
+   .. method:: get_bytes(key, from_=False)
+
+      Note: This method has an extra parameter (*from_*) compared with other classes.
+      The first line of an mbox file entry is the Unix "From " line.
+      If *from_* is False, the first line of the file is dropped.
+
+   .. method:: get_file(key, from_=False)
 
       Using the file after calling :meth:`~Mailbox.flush` or
       :meth:`~Mailbox.close` on the :class:`!MMDF` instance may yield
       unpredictable results or raise an exception.
 
+      Note: This method has an extra parameter (*from_*) compared with other classes.
+      The first line of an mbox file entry is the Unix "From " line.
+      If *from_* is False, the first line of the file is dropped.
+
 
    .. method:: lock()
                unlock()