Add enumeration and within as keywords, since it looked odd in the ke…

…yword table.

preamble.tex

@@ -205,10 +205,10 @@
     morekeywords=[1]{}, % blue Keywords
     morekeywords=[2]{% blue + bold keywords
         annotation,assert,block,break,class,connector,constant,constrainedby,discrete,%
-        each,encapsulated,else,elseif,elsewhen,end,exit,expandable,extends,external,final,flow,for,%
+        each,encapsulated,enumeration,else,elseif,elsewhen,end,exit,expandable,extends,external,final,flow,for,%
         function,if,in,inner,initial,input,import,loop,model,nondiscrete,operator,outer,%
         output,package,parameter,partial,record,redeclare,replaceable,return,%
-        size,stream,terminate,then,type,when,while,algorithm,equation,%
+        size,stream,terminate,then,type,when,while,within,algorithm,equation,%
         protected,public,and,false,not,or,true,pure,impure,transition,initialState},%
     % Note: initial is in both variants - depending on context, use first variant
     morekeywords=[3]{% red keywords - only special functions and classes: 3.7.2 #derivative-and-special-purpose-operators-with-function-syntax