Merge pull request #126 from timgates42/bugfix_typo_length

docs: fix simple typo, lenth -> length

Author: fogleman

main.py

@@ -190,7 +190,7 @@ def _initialize(self):
                         if (x - 0) ** 2 + (z - 0) ** 2 < 5 ** 2:
                             continue
                         self.add_block((x, y, z), t, immediate=False)
-                s -= d  # decrement side lenth so hills taper off
+                s -= d  # decrement side length so hills taper off
 
     def hit_test(self, position, vector, max_distance=8):
         """ Line of sight search from current position. If a block is