require errormsg to be specified before file.

tests/collections/tcollections.nim

@@ -1,7 +1,5 @@
 discard """
-  file: "tcollections.nim"
-  output: '''
-'''
+  output: ""
 """
 
 import deques, sequtils

tests/collections/ttables.nim

@@ -1,6 +1,5 @@
 discard """
-  file: "ttables.nim"
-  output: '''
+output: '''
 done
 And we get here
 1
@@ -142,7 +141,7 @@ block tindexby:
   tbl2.add("bar", elem1)
   tbl2.add("baz", elem2)
   doAssert indexBy(@[elem1,elem2], proc(x: TElem): string = x.bar) == tbl2, "element table"
-  
+
 
 block tableconstr:
   # Test if the new table constructor syntax works: