Merge pull request #482 from Madduxv/patch-1

Fixed typos in char-bool.md

solutions/basic-types/char-bool.md

@@ -75,7 +75,7 @@ use std::mem::size_of_val;
 
 fn main() {
     let unit: () = ();
-    // unit type does't occupy any memeory space
+    // unit type doesn't occupy any memory space
     assert!(size_of_val(&unit) == 0);
 }
 ```