Editing Template:Sp/doc (section)

====Inserting a space inside a parser function====
Sometimes when using [[w:Help:parser functions|parser functions]], you need to insert a space at the beginning or end of an optional message. {{tl|sp}} can be used for that purpose. In the following examples, look closely at the spacing between words and punctuation to see the subtle differences.

;Example
 <nowiki>I like green{{#if:{{{blue|}}}|and blue}}.</nowiki>
The above example works fine if 'blue' does not have a value ('<code>I like green.</code>').

However, if 'blue' is set to true (<code>|blue=true</code>), then the message is incorrectly run together ('<code>I like greenand blue.</code>').

 <nowiki>I like green {{#if:{{{blue|}}}|and blue}}.</nowiki>
Adding the space between 'green' and '&#123;&#123;#if' avoids running the '<code>green and</code>' together, but now there will be an extra space if 'blue' is not set ('<code>I like green .</code>').

 <nowiki>I like green{{#if:{{{blue|}}}| and blue}}.</nowiki>
Adding the space between the pipe ('&#124;') and the word 'and' doesn't work. Any leading or trailing spaces from a parser function output are stripped, so this produces exactly the same output as the first example when 'blue' is true ('<code>I like greenand blue.</code>').

 <nowiki>I like green{{#if:{{{blue|}}}|{{sp}}and blue}}.</nowiki>
This one works! By inserting the {{tl|sp}} in the parser function output, the space is not stripped, and the correct output is given whether blue is set to true ('<code>I like green and blue.</code>') or not set at all ('<code>I like green.</code>').