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+<!DOCTYPE html>
+<html>
+<!-- Created by GNU Texinfo 7.0.3, https://www.gnu.org/software/texinfo/ -->
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<!-- This manual documents GNU troff version 1.23.0.
+
+Copyright © 1994-2023 Free Software Foundation, Inc.
+
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
+copy of the license is included in the section entitled "GNU Free
+Documentation License". -->
+<title>Blank Line Traps (The GNU Troff Manual)</title>
+
+<meta name="description" content="Blank Line Traps (The GNU Troff Manual)">
+<meta name="keywords" content="Blank Line Traps (The GNU Troff Manual)">
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+
+<link href="index.html" rel="start" title="Top">
+<link href="Request-Index.html" rel="index" title="Request Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="Traps.html" rel="up" title="Traps">
+<link href="Leading-Space-Traps.html" rel="next" title="Leading Space Traps">
+<link href="Input-Line-Traps.html" rel="prev" title="Input Line Traps">
+<style type="text/css">
+<!--
+a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
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+strong.def-name {font-family: monospace; font-weight: bold; font-size: larger}
+-->
+</style>
+
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+</head>
+
+<body lang="en">
+<div class="subsection-level-extent" id="Blank-Line-Traps">
+<div class="nav-panel">
+<p>
+Next: <a href="Leading-Space-Traps.html" accesskey="n" rel="next">Leading Space Traps</a>, Previous: <a href="Input-Line-Traps.html" accesskey="p" rel="prev">Input Line Traps</a>, Up: <a href="Traps.html" accesskey="u" rel="up">Traps</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Request-Index.html" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<h4 class="subsection" id="Blank-Line-Traps-1">5.28.3 Blank Line Traps</h4>
+<a class="index-entry-id" id="index-blank-line-traps"></a>
+<a class="index-entry-id" id="index-traps_002c-blank-line"></a>
+
+<dl class="first-deffn">
+<dt class="deffn" id="index-_002eblm"><span class="category-def">Request: </span><span><strong class="def-name"><code class="t">.blm</code></strong> <var class="def-var-arguments">[<span class="r"><i class="slanted">name</i></span>]</var><a class="copiable-link" href='#index-_002eblm'> &para;</a></span></dt>
+<dd><a class="index-entry-id" id="index-blm"></a>
+<a class="index-entry-id" id="index-blank-line-macro-_0028blm_0029-2"></a>
+<p>Set a blank line trap, calling the macro <var class="var">name</var> when GNU
+<code class="code">troff</code> encounters a blank line in an input file, instead of the
+usual behavior (see <a class="pxref" href="Breaking.html">Breaking</a>). A line consisting only of spaces is
+also treated as blank and subject to this trap. If no argument is
+supplied, the default blank line behavior is (re-)established.
+</p></dd></dl>
+
+
+</div>
+
+
+
+</body>
+</html>