Fixing Strange first character at string append.

Fixing #111

Author: SeppPenner

Language/Variables/Data Types/String/Operators/append.adoc

@@ -1,4 +1,4 @@
----
+---
 title: "+="
 title_expanded: append
 categories: [ "Data Types" ]
@@ -57,4 +57,4 @@ None
 [role="example"]
 * #EXAMPLE# link: https://www.arduino.cc/en/Tutorial/BuiltInExamples#strings[Built-in String Tutorials]
 --
-// SEE ALSO SECTION ENDS
+// SEE ALSO SECTION ENDS