Fixed callout in README.adoc

Author: lefou

README.adoc

@@ -511,7 +511,7 @@ Add an one-arg option argument to a mutable collection of `String`s.
 Apply an _n_-arg option to a (setter) method with _n_ parameters of type `String`.
 <7> link:de.tototec.cmdoption/src/main/java/de/tototec/cmdoption/handler/LongHandler.java[`LongHandler`] --
 Apply an one-arg option to a `Long` or `long` field or method.
-<8>link:de.tototec.cmdoption/src/main/java/de/tototec/cmdoption/handler/LongHandler.java[`LongHandler`] --
+<8> link:de.tototec.cmdoption/src/main/java/de/tototec/cmdoption/handler/LongHandler.java[`LongHandler`] --
 Apply an one-arg option to a `Integer` or `int` field or method.
 <9> link:de.tototec.cmdoption/src/main/java/de/tototec/cmdoption/handler/EnumHandler.java[`EnumHandler`] --
 Parse a Sting to a Enum of the expected type and applies it to a field or a one-arg method.