Merge pull request #16732 from trusktr/patch-16

Docs: Update wrong description of Quaternion.inverse

Author: mrdoob

docs/api/en/math/Quaternion.html

@@ -115,8 +115,7 @@ <h3>[method:Quaternion fromArray]( [param:Array array], [param:Integer offset] )
 
 		<h3>[method:Quaternion inverse]()</h3>
 		<p>
-			Inverts this quaternion - calculate the [page:.conjugate conjugate] and then
-			[page:.normalize normalizes] the result.
+			Inverts this quaternion - calculates the [page:.conjugate conjugate]. The quaternion is assumed to have unit length.
 		</p>
 
 		<h3>[method:Float length]()</h3>