Fix grammar to accept more dictionaries

scone/head/grammar/scoml.tx

@@ -133,7 +133,7 @@ QuotedString:
 ;
 
 UnquotedString:
-  value=/[^\s\n,"()0-9]([^\n,"()]*[^\s\n,"()])?/
+  value=/[^]\s\n,"(){}[0-9=]([^]\n,"(){}[=]*[^]\s\n,"(){}[=])?/
 ;
 
 DottedIdString:
@@ -158,12 +158,12 @@ BracketList[ws=' \t\n']:
   ']'
 ;
 
-BraceDict[ws=' \t']:
+BraceDict[ws=' \t\n']:
   '{'
   pairs*=DictPair[',']
   '}'
 ;
 
-DictPair:
+DictPair[ws=' \t\n']:
   (key=KeyExpr) '=' (value=ValueExpr)
 ;