require errormsg to be specified before file.

tests/parallel/tgc_unsafe2.nim

@@ -1,10 +1,10 @@
 discard """
+  errormsg: "'consumer' is not GC-safe as it calls 'track'"
   line: 28
   nimout: '''tgc_unsafe2.nim(22, 6) Warning: 'trick' is not GC-safe as it accesses 'global' which is a global using GC'ed memory [GcUnsafe2]
 tgc_unsafe2.nim(26, 6) Warning: 'track' is not GC-safe as it calls 'trick' [GcUnsafe2]
 tgc_unsafe2.nim(28, 6) Error: 'consumer' is not GC-safe as it calls 'track'
 '''
-  errormsg: "'consumer' is not GC-safe as it calls 'track'"
 """
 
 import threadpool

tests/parallel/tsysspawnbadarg.nim

@@ -1,6 +1,6 @@
 discard """
-  line: 9
   errormsg: "'spawn' takes a call expression"
+  line: 9
   cmd: "nim $target --threads:on $options $file"
 """