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diff --git a/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-activechars.html b/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-activechars.html index 5cc1b11adac..3603f16be4e 100644 --- a/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-activechars.html +++ b/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-activechars.html @@ -2,13 +2,13 @@ <title>UK TeX FAQ -- question label activechars</title> </head><body> <h3>Defining characters as macros</h3> -<p>Single characters can act as macros (defined commands), and both +<p/>Single characters can act as macros (defined commands), and both Plain TeX and LaTeX define the character “<code>~</code>” as a “non-breakable space”. A character is made definable, or “active”, by setting its <em>category code</em> (catcode) to be <code>\</code><code>active</code> (13): <code>\catcode‘_=\active</code>. -<p>Any character could, in principle, be activated this way and defined +<p/>Any character could, in principle, be activated this way and defined as a macro (<code>\</code><code>def</code><code>_{</code><code>\</code><code>_</code><code>}</code> — the simple answer to <a href="FAQ-underscore.html">using underscores</a>), but you must be @@ -17,7 +17,7 @@ may be unexpected and interact badly with other macros. Furthermore, by defining an active character, you preclude the character’s use for other purposes, and there are few characters “free” to be subverted in this way. -<p>To define the character “<code>z</code>” as a command, one would say something +<p/>To define the character “<code>z</code>” as a command, one would say something like: <blockquote> <pre> @@ -32,7 +32,7 @@ a letter; the space is therefore not necessary — “<code>\defz</code> choose to retain the space, for what little clarity we can manage.) Some LaTeX packages facilitate such definitions. For example, the <i>shortvrb</i> package with its <code>\</code><code>MakeShortVerb</code> command. -<p>TeX uses category codes to interpret characters as they are read +<p/>TeX uses category codes to interpret characters as they are read from the input. <em>Changing a catcode value will not affect characters that have already been read</em>. @@ -48,9 +48,9 @@ files using the <i>shortvrb</i> package to define <code>|...|</code> as a shorthand for <code>\</code><code>verb</code><code>|...|</code>. But <code>|</code> is also used in the preambles of tabular environments, so that tables in -<code>.dtx</code> files can only have vertical line separation between columns by -employing special measures of some sort. -<p>Another consequence is that catcode assignments made +<code>.dtx</code> files can only have vertical line separation between +columns by employing special measures of some sort. +<p/>Another consequence is that catcode assignments made in macros often don’t work as expected (see “<a href="FAQ-actinarg.html">Active characters in command arguments</a>”). For example, the definition @@ -95,7 +95,7 @@ explicitly changing a catcode: The two definitions have the same overall effect (the character is defined as a command, but the character does not remain active), except that the first defines a <code>\</code><code>global</code> command. -<p>For active characters to be used only in maths mode, it is much better +<p/>For active characters to be used only in maths mode, it is much better to leave the character having its ordinary catcode, but assign it a special active <em>maths code</em>, as with <blockquote> @@ -116,5 +116,5 @@ becomes accessible again if the character once again becomes active. <dt><tt><i>doc.sty</i></tt><dd>Distributed as part of the source of LaTeX, <a href="ftp://cam.ctan.org/tex-archive/macros/latex/base.zip">macros/latex/base</a> (<a href="ftp://cam.ctan.org/tex-archive/macros/latex/base.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/macros/latex/base/">browse</a>) <dt><tt><i>shortvrb.sty</i></tt><dd>Distributed as part of <a href="ftp://cam.ctan.org/tex-archive/macros/latex/required/tools.zip">macros/latex/required/tools</a> (<a href="ftp://cam.ctan.org/tex-archive/macros/latex/required/tools.tar.gz">gzipped tar</a>, <a href="http://www.tex.ac.uk/tex-archive/macros/latex/required/tools/">browse</a>) </dl> -<p><p><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=activechars">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=activechars</a> +<p/><p/><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=activechars">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=activechars</a> </body> |