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<h3 class="section">14.2 Inserting Quote Characters</h3>

<p><a name="index-Inserting-quote-characters-658"></a><a name="index-Quote-characters_002c-inserting-659"></a>
As explained in the early section on general Texinfo input conventions
(see <a href="Conventions.html#Conventions">Conventions</a>), Texinfo source files use the ASCII character
<code>`</code> (96 decimal) to produce a left quote (`), and ASCII <code>'</code>
(39 decimal) to produce a right quote (').  Doubling these input
characters (<code>``</code> and <code>''</code>) produces double quotes (&ldquo; and
&rdquo;).  These are the conventions used by TeX.

  <p>This works all right for text.  However, in examples of computer code,
readers are especially likely to cut and paste the text
verbatim&mdash;and, unfortunately, some document viewers will mangle these
characters.  (The free PDF reader <samp><span class="command">xpdf</span></samp> works fine, but other
PDF readers, both free and nonfree, have problems.)

  <p>If this is a concern for your document, Texinfo provides two special
settings via <code>@set</code>:

     <dl>
<dt><code>@set txicodequoteundirected</code><dd>causes the output for the <code>'</code> character to be the undirected
single quote, like this:

     <p><code>'</code>.

     <br><dt><code>@set txicodequotebacktick</code><dd>Cause the output for the <code>`</code> character to be the standalone grave
accent, like this:

     <p><code>`</code>.

  </dl>

  <p><code>xyza`'bc</code>

  <p>If you want these settings for only part of the document,
<code>@clear</code> will restore the normal behavior, as in
<code>@clear&nbsp;txicodequoteundirected</code>.

  <p>These settings affect <code>@code</code>, <code>@example</code>, and
<code>@verbatim</code>; they do not affect <code>@samp</code>.  (See <a href="Useful-Highlighting.html#Useful-Highlighting">Useful Highlighting</a>.)

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