require errormsg to be specified before file.

tests/let/tlet.nim

@@ -1,6 +1,6 @@
 discard """
-  line: "10"
   errormsg: "'name' cannot be assigned to"
+  line: "10"
 """
 
 echo("What's your name? ")
@@ -8,4 +8,3 @@ let name = readLine(stdin)
 while name == "":
   echo("Please tell me your name: ")
   name = readLine(stdin)
-

tests/let/tlet2.nim

@@ -1,6 +1,6 @@
 discard """
-  line: "13"
   errormsg: "type mismatch: got <int literal(8), int literal(5), int, int>"
+  line: "13"
 """
 
 proc divmod(a, b: int, res, remainder: var int) =
@@ -13,4 +13,3 @@ let
 divmod(8, 5, x, y) # modifies x and y
 echo(x)
 echo(y)
-