escape & to fix javadoc generation

Author: TheSnoozer

core/src/main/java/pl/project13/core/GitDataProvider.java

@@ -292,7 +292,7 @@ public static <T> SupplierEx<T> memoize(SupplierEx<T> delegate) {
    *  </pre>
    *  The "userinfo" part is declared in the same section allowing the following pattern:
    *  <pre>
-   *    userinfo = *( unreserved | escaped | ";" | ":" | "&" | "=" | "+" | "$" | "," )
+   *    userinfo = *( unreserved | escaped | ";" | ":" | "&amp;" | "=" | "+" | "$" | "," )
    *  </pre>
    *  The "unreserved" part is declared in section "2.3. Unreserved Characters" as the following:
    *  <pre>