Use ascii ' instead of unicode ’ in file ctkEventAdmin.h

Libs/PluginFramework/service/event/ctkEventAdmin.h

@@ -114,7 +114,7 @@ struct ctkEventAdmin
    *
    * Slots should be registered with a property ctkEventConstants::EVENT_TOPIC.
    * The value being a QString or QStringList object that describes which
-   * topics the slot is interested in. A wildcard (’*’ \\u002A) may be used as
+   * topics the slot is interested in. A wildcard ('*' \\u002A) may be used as
    * the last token of a topic name, for example com/action&#47*. This matches any
    * topic that shares the same first tokens. For example, com/action&#47* matches
    * com/action/listen. Slots which have not been specified with the EVENT_TOPIC
@@ -122,7 +122,7 @@ struct ctkEventAdmin
    * The value of each entry in the EVENT_TOPIC property must conform to the
    * following grammar:
    * \verbatim
-   * topic-scope ::= ’*’ | ( topic ’&#47*’ ? )
+   * topic-scope ::= '*' | ( topic '&#47*' ? )
    * \endverbatim
    *
    * Slots can also be registered with a property named ctkEventConstants::EVENT_FILTER.