Re: Tabulation in multiline headers

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+Date: Sat, 18 Oct 2014 05:37:39 +0400\r
+Message-ID:\r
+ <CAHc2pO21-pahkpyT1jYk2ExWHDGiOO+weovMA-vd8s82LpqK4A@mail.gmail.com>\r
+Subject: Re: Tabulation in multiline headers\r
+From: Sergei Shilovsky <sshilovsky@gmail.com>\r
+To: Jameson Graef Rollins <jrollins@finestructure.net>\r
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+\r
+> Hi, Sergei.  I'm not clear on where exactly you are seeing a problem\r
+> with this tab in the subject line.  Is it showing up somewhere you think\r
+> it shouldn't?\r
+\r
+It is shown in e.g. `notmuch show` as well as\r
+'notmuch_message_get_header(m, "subject")`\r
+\r
+> I'm not sure libnotmuch should be doing any scrubbing of the message\r
+> contents.  The emacs UI does seem to replace the tab with a space,\r
+> though.  Maybe other MUAs should be doing the same?\r
+\r
+My point is that this tabulation character does not relate to the\r
+contents of the header (this might be arguable though) and libnotmuch\r
+should return the contents, not its representation on file system.\r
+\r
+--=20\r
+=D0=A1 =D1=83=D0=B2=D0=B0=D0=B6=D0=B5=D0=BD=D0=B8=D0=B5=D0=BC,\r
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+=D0=BA=D0=B8=D0=B9\r
+Sergei Shilovsky\r