Minor cleanup and refactoring.

src/main/java/rs/in/zivanovic/sss/SasUtils.java

@@ -49,7 +49,7 @@ public final class SasUtils {
     public static BigInteger encodeStringToInteger(String str) {
         byte[] bytes = str.getBytes(StandardCharsets.UTF_8);
         byte[] res;
-        if ((bytes[0] & 0b10000000) >> 7 == 1) {
+        if ((bytes[0] & 0b1000_0000) >> 7 == 1) {
             res = new byte[bytes.length + 1];
             res[0] = 0;
             System.arraycopy(bytes, 0, res, 1, bytes.length);

src/main/java/rs/in/zivanovic/sss/SecretShare.java

@@ -84,10 +84,7 @@ public final class SecretShare {
         if (!Objects.equals(this.share, other.share)) {
             return false;
         }
-        if (!Objects.equals(this.prime, other.prime)) {
-            return false;
-        }
-        return true;
+        return Objects.equals(this.prime, other.prime);
     }
 
     @Override