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<div style="float: right; padding: 0 1em;">{{navbar|Blockquote paragraphs|plain=y}}</div>
The {{tag|blockquote|o}} element and any templates that use it do not honor newlines:
Due to the utterly intractable [[MediaWiki]] bug reported at {{bugzilla|6200}}, and still unfixed {{as of|February 2012|lc=y}}, block quoting on Wikipedia, with or without a template, cannot handle freeform linebreaking for paragraphs and poems and the like, unless formatted one very specific (and annoying) way. It's not a problem of blockquote templates, but all uses of {{tag|blockquote|open}}.
{{markup
|<nowiki><blockquote>
{{collapse top|left=y|title=The problem in action: test cases that seem like they should work but fail|bg=#EEEEEE|bg2=#ECFCF4}}<div class="collapse-workaround">
Line 1
The intuitive choice:
<blockquote><code><nowiki>{{</nowiki><includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br />
Line 2 <br />
Line 3 <br />
Line 4}}</code></blockquote>
results in the mangled:
{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1
Line 2
Line 3
Line 4}}
</blockquote></nowiki>
|<blockquote>
Blank lines seem to work at first:
Line 1
<blockquote><code><nowiki>{{</nowiki><includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br />
<br />
Line 2 <br />
<br />
Line 3 <br />
<br />
Line 4}}</code></blockquote>
though with quite tall spacing between the content blocks (lines, in our test cases):
{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1
Line 2
Line 3
Line 4
</blockquote>
}}
To resolve this, use the {{xtag|poem}} tag inside {{tag|blockquote|o}}:
Line 4}}
{{markup
|<nowiki><blockquote><poem>
Yet this markup fails when the indent wikimarkup ":" is used:
Line 1
:{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1
Line 2
Line 3
Line 4
</poem></blockquote></nowiki>
Line 4}}
|<blockquote><poem>
Line 1
Just trying to use {{tag|p}} or {{tag|br|single}} markup won't solve all the problems:
Line 2
Line 3
<blockquote><code><nowiki>{{</nowiki><includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br/><br />
Line 2 <br/><br />4
</poem></blockquote>
Line 3 <br/><br />
}}<noinclude>
Line 4}}</code></blockquote>
results in odd spacing, with the middle blocks too close together:
{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br />
Line 2 <br />
Line 3 <br />
Line 4}}
Meanwhile this version seems OK at first:
<blockquote><code><nowiki>{{</nowiki><includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|<p>Line 1</p><br />
<p>Line 2</p><br />
<p>Line 3</p><br />
<p>Line 4</p>}}</code></blockquote>
{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|<p>Line 1</p>
<p>Line 2</p>
<p>Line 3</p>
<p>Line 4</p>}}
but again can't be indented in by use of the indent wikimarkup ":"
:{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|<p>Line 1</p>
<p>Line 2</p>
<p>Line 3</p>
<p>Line 4</p>}}
{{collapse bottom}}
{{As of|February 2012}}, the {{em|only}} solution for the problem is to use {{em|unbroken markup}} with {{tag|p}} or {{tag|br|single}} elements (or others, like nested blockquotes and lists):
:{{tnull|<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br/>Line 2 <br/>Line 3 <br/>Line 4.}}
which, while hard to read, especially for long content, results in the expected:
{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br />Line 2 <br />Line 3 <br />Line 4.}}
And it {{em|does}} work with the indent wikimarkup ":", unlike the failed test cases hereinbefore:
:{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|Line 1 <br />Line 2 <br />Line 3 <br />Line 4.}}
Happily, there is a [[HTML]] comment workaround for readability that lets you do whatever you want:
<blockquote><code><nowiki>
{{</nowiki><includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|1=<!--<br />
-->Line 1 <br/><!--<br />
-->Line 2 <br/><!--<br />
-->Line 3 <br/><!--<br />
-->Line 4.}}
</code></blockquote>
or even:
<blockquote><code><nowiki>
{{</nowiki><includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|1=<!--<br />
<br />
-->Line 1 <br/><!--<br />
<br />
-->Line 2 <br/><!--<br />
<br />
-->Line 3 <br/><!--<br />
<br />
-->Line 4.}}
</code></blockquote>
which results in the expected:
{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|1=<!--
-->Line 1 <br /><!--
-->Line 2 <br /><!--
-->Line 3 <br /><!--
-->Line 4.}}
They {{em|are}} citable:
:{{<includeonly>{{BASEPAGENAME}}</includeonly><noinclude>bq</noinclude>|1=<!--
-->Line 1 <br /><!--
-->Line 2 <br /><!--
-->Line 3 <br /><!--
-->Line 4.}}<noinclude>
{{Documentation}}
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