Update concept-yarn-script.md

docs/2.18/concept-yarn-script.md

@@ -2,8 +2,6 @@
 
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-?> This is an edited copy of the [YarnSpinner Quick Refence Guide](https://github.com/thesecretlab/YarnSpinner/blob/master/Documentation/YarnSpinner-Dialogue/Yarn-Syntax.md) (retrieved 2019-04-18)
-
 ## Introduction
 
 Chatterbox is an implementation of the YarnScripting language. However, Chatterbox does slightly extend its functionality,
@@ -405,4 +403,4 @@ Chatterbox allows you to, at will, fast-forward past content strings. This is ha
 
 Fast-forwarding is typically triggered by calling `ChatterboxFastForward()` but you may also find it useful to trigger a fast-forward from YarnScript. You can do this using `<<fastforward>>` in YarnScript as you would other actions.
 
-You can also turn fast-forwarding off from inside YarnScript as well; this is done with the `<<fastmark>>` action. Content **after** `<<fastmark>>` will still appear but any content between triggering fast-forwarding and `<<fastmark>>` will not appear.
+You can also turn fast-forwarding off from inside YarnScript as well; this is done with the `<<fastmark>>` action. Content **after** `<<fastmark>>` will still appear but any content between triggering fast-forwarding and `<<fastmark>>` will not appear.