Modified footnotes.

Modified footnotes due to footnote marks not rendering in superscript.

src/docs/asciidoc/jme3/advanced/jme3_ai.adoc

@@ -10,7 +10,7 @@ ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 
 Most games written need some type of link:https://en.wikipedia.org/wiki/Artificial_intelligence_(video_games)[Artificial Intelligence] to deliver a feeling of realism, excitement or challenge to the player. AI can be as simple as having an NPC (Non Player Character) respond to some action taken by a player or as complicated as smoothly navigating your way through a scene full of obstacles without getting stuck. It's a time-consuming and significant challenge to develop these systems so its much easier to use an existing library to do the heavy lifting for you. 
 
-Unfortunately, the jMonkeyEngine comes with no official library for dealing with AI. There is, however, the jme3 Artificial Intelligence library that is probably the closest there is to an official release. Although it never made it into any official releases, it was designed, in part, by core team members. It consists of two separate AI models, a link:https://en.wikipedia.org/wiki/Navigation_mesh[Navigation Mesh] library using link:https://en.wikipedia.org/wiki/Pathfinding[path-finding],footnoteref:[finding,Computing the shortest route between two points. Usually mazes.] and a simple Steering Behaviours library that uses path-following.footnoteref:[following,Taking a path that already exists and then following that path.] 
+Unfortunately, the jMonkeyEngine comes with no official library for dealing with AI. There is, however, the jme3 Artificial Intelligence library that is probably the closest there is to an official release. Although it never made it into any official releases, it was designed, in part, by core team members. It consists of two separate AI models, a link:https://en.wikipedia.org/wiki/Navigation_mesh[Navigation Mesh] library using link:https://en.wikipedia.org/wiki/Pathfinding[path-finding], and a simple Steering Behaviours library that uses path-following. 
 
 You can read about the introduction of the library in the forum thread: link:https://hub.jmonkeyengine.org/t/ai-plugin-now-with-navmesh-pathfinding/24644[AI plugin now with NavMesh pathfinding]. 
 
@@ -20,8 +20,8 @@ The library and javaDocs can be found in the link:https://github.com/jMonkeyEngi
 
 The jme3 Artificial Intelligence Library:
 
-*  NavMesh - A Navigation Mesh path-finding AI system using the link:https://en.wikipedia.org/wiki/A*_search_algorithm[A*] algorithm.footnoteref:[finding]
-*  Steering - Contains the foundations of an link:http://natureofcode.com/book/chapter-6-autonomous-agents/[Autonomous Agent] system that uses path-following and forces to move a character through its environment.footnoteref:[following] Includes a test case as well.  
+*  NavMesh - A Navigation Mesh path-finding AI system using the link:https://en.wikipedia.org/wiki/A*_search_algorithm[A*] algorithm.footnote:[Path-finding means computing the shortest route between two points. Usually mazes.]
+*  Steering - Contains the foundations of an link:http://natureofcode.com/book/chapter-6-autonomous-agents/[Autonomous Agent] system that uses path-following and forces to move a character through its environment. Includes a test case as well.footnote:[Path-following is taking a path that already exists and then following that path.]  
 
 
 == Use Examples