Update formatting and description of some older math snippets

snippets/hammingDistance.md

@@ -1,11 +1,11 @@
 ---
 title: hammingDistance
-tags: math,beginner
+tags: math,regexp,intermediate
 ---
 
 Calculates the Hamming distance between two values.
 
-Use XOR operator (`^`) to find the bit difference between the two numbers, convert to a binary string using `toString(2)`.
+Use the XOR operator (`^`) to find the bit difference between the two numbers, convert to a binary string using `toString(2)`.
 Count and return the number of `1`s in the string, using `match(/1/g)`.
 
 ```js

snippets/toSafeInteger.md

@@ -10,7 +10,9 @@ Use `Math.round()` to convert to an integer.
 
 ```js
 const toSafeInteger = num =>
-  Math.round(Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER));
+  Math.round(
+    Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER)
+  );
 ```
 
 ```js