Removed extra spaces

Author: blinkityblank

_CodingChallenges/112-3d-rendering.md

@@ -21,7 +21,6 @@ videos:
     video_id: "uSzGdfdOoG8"
   - title: "Matrix Multiplication for 3D Rendering"
     video_id: "tzsgS19RRc8"
-  
 ---
 
 In this coding challenge, I use matrix math to project a 3D object on a 2D plane, in Processing(Java).

_CodingChallenges/113-hypercube.md

@@ -23,7 +23,6 @@ videos:
     video_id: "uSzGdfdOoG8"
   - title: "Matrix Multiplication for 3D Rendering"
     video_id: "tzsgS19RRc8"
-  
 ---
 
 In this coding challenge, I visualize a 4D Hypercube(aka "Tesseract") in Processing(Java).

_CodingChallenges/114-bubble-sort.md

@@ -9,7 +9,6 @@ live_example: false
 links:
   - title: "Visualizing Algorithms"
     url: "https://bost.ocks.org/mike/algorithms/"
-  
 ---
 
 In this coding challenge, I implement a "bubble sort" algorithm in Processing(Java) and sort randomly generated lines. [#SortingTrain](https://twitter.com/hashtag/SortingTrain)