Patch #462190, patch #464070: Support quoted printable in the binascii module.
Decode and encode underscores for header style encoding. Fixes bug #463996.
diff --git a/Doc/lib/libquopri.tex b/Doc/lib/libquopri.tex
index 4079d27..9e7895b 100644
--- a/Doc/lib/libquopri.tex
+++ b/Doc/lib/libquopri.tex
@@ -7,21 +7,27 @@
This module performs quoted-printable transport encoding and decoding,
-as defined in \rfc{1521}: ``MIME (Multipurpose Internet Mail Extensions)
-Part One''. The quoted-printable encoding is designed for data where
-there are relatively few nonprintable characters; the base64 encoding
-scheme available via the \refmodule{base64} module is more compact if there
-are many such characters, as when sending a graphics file.
+as defined in \rfc{1521}: ``MIME (Multipurpose Internet Mail
+Extensions) Part One: Mechanisms for Specifying and Describing the
+Format of Internet Message Bodies''. The quoted-printable encoding is
+designed for data where there are relatively few nonprintable
+characters; the base64 encoding scheme available via the
+\refmodule{base64} module is more compact if there are many such
+characters, as when sending a graphics file.
\indexii{quoted-printable}{encoding}
\index{MIME!quoted-printable encoding}
-\begin{funcdesc}{decode}{input, output}
+\begin{funcdesc}{decode}{input, output\optional{,header}}
Decode the contents of the \var{input} file and write the resulting
decoded binary data to the \var{output} file.
\var{input} and \var{output} must either be file objects or objects that
mimic the file object interface. \var{input} will be read until
\code{\var{input}.readline()} returns an empty string.
+If the optional argument \var{header} is present and true, underscore
+will be decoded as space. This is used to decode
+``Q''-encoded headers as described in \rfc{1522}: ``MIME (Multipurpose Internet Mail Extensions)
+Part Two: Message Header Extensions for Non-ASCII Text''.
\end{funcdesc}
\begin{funcdesc}{encode}{input, output, quotetabs}
@@ -36,7 +42,7 @@
appearing at the end of lines are always encoded, as per \rfc{1521}.
\end{funcdesc}
-\begin{funcdesc}{decodestring}{s}
+\begin{funcdesc}{decodestring}{s\optional{,header}}
Like \function{decode()}, except that it accepts a source string and
returns the corresponding decoded string.
\end{funcdesc}