src/main/java/org/fest/assertions/Formatting.java
public static @NotNull String format(@Nullable Description description, @NotNull String message) {
    checkNotNull(message);
    String s = valueOf(description);
    return format(s) + message;
  }
public static @NotNull String format(@Nullable Description description, @NotNull String message) {
    checkNotNull(message);
    String s = valueOf(description);
    return format(s) + message;
  }
Returns the given message formatted as follows:
<pre>
[description] message.
</pre>

@param description the description of the actual value in the failed assertion. It can be {@code null}.
@param message     the message to format.
@return the formatted message.
@throws NullPointerException if the given message is {@code null}.
@since 1.2