A few more basic expressions, some bits about newlines

idea/testData/psi/Decomposers_ERR.txt

@@ -6,7 +6,7 @@ JetFile: Decomposers_ERR.jet
       DECOMPOSER_PROPERTY_LIST
         PsiElement(LPAR)('(')
         PsiElement(IDENTIFIER)('a')
-        PsiErrorElement:Expecting a property name or a closing ')'
+        PsiErrorElement:Expecting ',' or a closing ')'
           <empty list>
         PsiWhiteSpace(' ')
         PsiElement(IDENTIFIER)('a')

idea/testData/psi/SimpleClassMembers_ERR.txt

@@ -90,7 +90,7 @@ JetFile: SimpleClassMembers_ERR.jet
             PsiElement(COMMA)(',')
             PsiWhiteSpace(' ')
             PsiElement(IDENTIFIER)('c')
-            PsiErrorElement:Expecting ')' to close a property list
+            PsiErrorElement:Expecting ',' or a closing ')'
               <empty list>
         PsiWhiteSpace('\n\n    ')
         CONSTRUCTOR