GNU bug report logs - #23584
[25.0.94.1] paragraph forward-backward inconsistent

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From: =?UTF-8?Q?Andreas_R=c3=b6hler?= <andreas.roehler@HIDDEN>
Subject: [25.0.94.1] paragraph forward-backward inconsistent
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Date: Fri, 20 May 2016 11:17:25 +0200
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GNU Emacs 25.0.94.1 (i686-pc-linux-gnu, GTK+ Version 2.24.25) of 2016-05-18

Put text at end of mail in html-mode. It should consist of two lines, 
contain a newline before last line. Cursor at "href=" at last line. M-x 
backward-paragraph RET jumps to BOB. While from BOB M-x 
forward-paragraph RET would stop at BOL of last-line, i.e. before start-pos.

AFAIU cause is in sgml-mode.el

Where values of (defconst sgml-name-re "[_:[:alpha:]][-_.:[:alnum:]]*")

later on are included

   (setq-local paragraph-start (concat "[ \t]*$\\|\
[ \t]*</?\\(" sgml-name-re sgml-attrs-re "\\)?>"))
   (setq-local paragraph-separate (concat paragraph-start "$"))



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