Fix typo.

docs/api/textures/Texture.html

@@ -203,7 +203,7 @@
 		[page:Textures THREE.LinearEncoding] is the default.
 		See the [page:Textures texture constants] page for details of other formats.<br /><br />
 
-		Note that ff this value is changed on a texture after the material has been used,
+		Note that if this value is changed on a texture after the material has been used,
 		it is necessary to trigger a Material.needsUpdate for this value to be realized in the shader.
 		</div>