Documentation: Fix typo in action 0 remapping description

docs/newgrf-additions.html

@@ -75,7 +75,7 @@
 	<h3 id="feature-test">Action 14 - Property Mapping for Action 0</h3>
 	<p>See <a href="https://newgrf-specs.tt-wiki.net/wiki/Action14">Action 14 Specification</a> and <a href="https://newgrf-specs.tt-wiki.net/wiki/Action0">Action 0 Specification</a> for background information.</p>
 	<p>The property mapping mechanism has the feature name: <font face="monospace">property_mapping</font>, this document describes version 1.</p>
-	<p>Users of this mechanism SHOULD at minimum use test for the presence of the feature above or test variable 8D, below.</p>
+	<p>Users of this mechanism SHOULD at minimum test for the presence of the feature above or test variable 8D, below.</p>
 	<h4>Property Mapping: C "A0PM"</h4>
 	<p>Each A0PM chunk (type C) describes an individual property mapping.<br />
 	Sub-chunks within each A0PM chunk may appear in any order, however except where otherwise noted each sub-chunk SHOULD only appear ONCE within an individual A0PM chunk.</p>