Editing Template:If/doc (section)

===Indentation===
If indenting the markup, care must be taken to avoid extra newlines when indenting "}}" on the next line. An extra bar pipe "|" can be added after the else-clause to complete that text, and allow "}}" to then be placed anywhere without adding a newline into the else-clause. For example:
:::* <syntaxhighlight lang="text">{{if|{{{1|}}}
    |then found parameter 1|else no parameter 1| ← extra "|" ends else-clause
}}</syntaxhighlight >
When the else-clause is indented to the next line, a newline (CR/LF) is added:
:::* <syntaxhighlight lang="text">{{if|{{{1|}}}
    |then found parameter 1 ← extra newline here
    |else noparameter 1|
}}</syntaxhighlight>
To indent the else-clause, split an [[HTML]]-form comment, as "<code>&lt;!--</code>" with next line as "<code>--&gt;|else...</code>". Unless each then-clause and else-clause is carefully tested, to watch for extra newlines, then the results are likely to cause broken lines, with extra line breaks for each newline. For that reason, a global edit with simple search-and-replace of "<code>{#if:</code>" to "<code>{if||</code>" is likely to leave newline problems, wherever the original markup was wrapped to indent either the else-clause or "}}" of each if-structure. Indenting the then-clause is not a problem.