Added Tuple to keywords
diff --git a/mkdocs/docs/assets/javascript/google-code-prettify/lang-epsilon.js b/mkdocs/docs/assets/javascript/google-code-prettify/lang-epsilon.js
index ddf9c7c..79f73fa 100644
--- a/mkdocs/docs/assets/javascript/google-code-prettify/lang-epsilon.js
+++ b/mkdocs/docs/assets/javascript/google-code-prettify/lang-epsilon.js
@@ -72,7 +72,7 @@
          // [PR['PR_TYPE'],        /^[$_]*[A-Z][_$A-Z0-9]*[a-z][\w$]*/],
          [PR['PR_COMMENT'],     /^\/(?:\/.*|\*(?:\/|\**[^*/])*(?:\*+\/?)?)/],
          [PR['PR_PUNCTUATION'], /^(?:\.+|\/)/],
-         [PR['PR_TYPE'], new RegExp("^(?:Any|String|Integer|Real|Boolean|Native|Bag|Set|List|Sequence|Map|OrderedSet|Collection|ConcurrentBag|ConcurrentMap|ConcurrentSet)\\b")],
+         [PR['PR_TYPE'], new RegExp("^(?:Any|String|Integer|Real|Boolean|Native|Bag|Set|List|Sequence|Map|OrderedSet|Collection|Tuple|ConcurrentBag|ConcurrentMap|ConcurrentSet)\\b")],
         [PR['PR_TAG'],      /^(?:(@|\$)\w+)/],
         [PR['PR_PLAIN'],       /^[$a-zA-Z_][\w$]*/],
 
diff --git a/mkdocs/epsilon_lexers.py b/mkdocs/epsilon_lexers.py
index 2b28f0e..92c7261 100644
--- a/mkdocs/epsilon_lexers.py
+++ b/mkdocs/epsilon_lexers.py
@@ -25,7 +25,7 @@
         (r'[0-9]+(l|L)', Literal.Number.Integer.Long),
         (r'null', Name.Builtin),
         (r'self|hasMore|loopCount', Name.Builtin.Pseudo),
-        (r'Any|String|Integer|Real|Boolean|Native|Bag|Set|List|Sequence|Map|OrderedSet|Collection|ConcurrentBag|ConcurrentMap|ConcurrentSet', Name.Class),
+        (r'Any|String|Integer|Real|Boolean|Native|Bag|Set|List|Sequence|Map|Tuple|OrderedSet|Collection|ConcurrentBag|ConcurrentMap|ConcurrentSet', Name.Class),
         (r'select|collect|exists|selectOne|one|forAll|reject|mapBy|aggregate|closure|sortBy|selectFirst|rejectOne|count|nMatch|atLeastNMatch|atMostNMatch|func|runnable|supplier|consumer', Name.Function),
         (r'func|runnable|supplier|consumer', Name.Function.Magic),
         (r'\.|\+|-|/|\*|=|==|<>|>=|<=|>|<|/\*|\+=|\*=|-=|/=|--|\+\+|=>|\||\?|->|#', Operator),