Fix spacing

Author: zohairawan

src/loops_ii/comparison_to_while.md

@@ -54,7 +54,7 @@ while (index < numbers.length) {
 ~}
 ```
 
-Us humans, with our tiny monkey brains, can get very lost when things that are related to eachother are separated
+Us humans, with our tiny monkey brains, can get very lost when things that are related to each other are separated
 by long distances.
 
 In this dimension, for loops are superior. All the bits of code that "control the loop" can be right at the top.