Fix clang-format: remove blank line after class brace, fix param alignment

Author: InukaWijerathna

src/main/java/com/thealgorithms/maths/ReturnOnInvestment.java

@@ -9,15 +9,14 @@
  * @see <a href="https://www.investopedia.com/terms/r/returnoninvestment.asp">Investopedia</a>
  */
 public final class ReturnOnInvestment {
-
     private ReturnOnInvestment() {
     }
 
     /**
      * Calculates the return on investment as a percentage.
      *
      * @param gainFromInvestment the total value gained from the investment
-     * @param costOfInvestment   the total cost of the investment
+     * @param costOfInvestment the total cost of the investment
      * @return ROI as a percentage
      * @throws IllegalArgumentException if costOfInvestment is not positive
      */