Fix spelling issues in documentation

Signed-off-by: yexiaochuan <[email protected]>

Author: XueSongTap

examples/lidar_visual/README.md

@@ -1,8 +1,8 @@
 # Lidar Visual Example
 
-Demo of a lidar visualisation using data from a GPU Rays sensor.
+Demo of a lidar visualization using data from a GPU Rays sensor.
 A laser sensor model is used to detect objects in the rendering window
-environment and the collected data is visualised.
+environment and the collected data is visualization.
 
 ## Build
 

tutorials/13_custom_scene_viewer.md

@@ -6,7 +6,7 @@ When the application starts you will see a blank window.
 When you click the `+` or `-` keys you can change the scene.
 By pressing the `Tab` button you will advance to the next render engine.
 
-The following scenes have more primitive objects such as cones or cilinders. Again, you can see the scene with different render engines pressing `Tab`.
+The following scenes have more primitive objects such as cones or cylinders. Again, you can see the scene with different render engines pressing `Tab`.
 Some of the scenes available include:
 
  - Shapes
@@ -15,7 +15,7 @@ Some of the scenes available include:
  - Reflective property
  - Soft shadows
 
-There are some scenes demonstrating reflective materials and mutiple point light shadows but they appear the same in ogre because they are not supported.
+There are some scenes demonstrating reflective materials and multiple point light shadows but they appear the same in ogre because they are not supported.
 
 ## Compile and run the example