add code examples sections

rules/S6534/javascript/rule.adoc

@@ -40,7 +40,7 @@ myBigInt + 1n === myBigInt + 2n;  // false
 
 For large numbers, JavaScript provides the helper function `Number.isSafeInteger()` to test if a number is between the safe limits.
 
-When you need to store a large number, use `BigInt`. `BigInt` and `Number` can be compared between them as usual (e.g. `>`, `==`), but pay attention that arithmetic operations (`+` `pass:[*]` `-` `%` `pass:[**]`) between both types raise an error unless they are converted to the same type,. Use the `BigInt` and `Number` functions to convert between both types:
+When you need to store a large number, use `BigInt`. `BigInt` and `Number` can be compared between them as usual (e.g. `>`, `==`), but pay attention that arithmetic operations (`+` `pass:[*]` `-` `%` `pass:[**]`) between both types raise an error unless they are converted to the same type. Use the `BigInt` and `Number` functions to convert between both types:
 [source,javascript]
 ----
 const myNumber = Number(myBigInt);