Merge pull request arduino#319 from per1234/quote-isWhitespace

Use standard markup for isWhitespace syntax section

Author: kengdahl

Language/Functions/Characters/isWhitespace.adoc

@@ -25,9 +25,8 @@ Returns true if thisChar contains a white space.
 [float]
 === Syntax
 [source,arduino]
-----
-isWhitespace(thisChar)
-----
+`isWhitespace(thisChar)`
+
 
 [float]
 === Parameters