Format code with prettier.

Author: russom-g

implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -21,4 +21,3 @@ export function isProperFraction(numerator, denominator) {
     return false;
   }
 }
-

implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js

@@ -58,4 +58,4 @@ test(`should return false for both negative improper fraction`, () => {
 
 test(`should return false for negative denominator improper fraction`, () => {
   expect(isProperFraction(2, -9)).toEqual(false);
-});
+});