Fix license formatting (#13)

Author: fboemer

LICENSE.txt

@@ -1,7 +1,3 @@
-Swift Homomorphic Encryption is licensed for use as follows:
-
-"""
-
                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
@@ -203,7 +199,8 @@ Swift Homomorphic Encryption is licensed for use as follows:
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
-"""
+
+-------------------------------------------------------------------------
 
 This license applies to parts of Swift Homomorphic Encryption originating from the https://github.com/apple/swift/ repository:
 - Sources/HomomorphicEncryption/DoubleWidthUInt.swift