make tests green again

doc/manual.rst

@@ -5160,7 +5160,7 @@ template cannot be accessed in the instantiation context:
 
   # so this works:
   let e = "message"
-  raise newException(EIO, e)
+  raise newException(IoError, e)
 
 
 Whether a symbol that is declared in a template is exposed to the instantiation

tests/stdlib/tmemfiles2.nim

@@ -1,5 +1,5 @@
 discard """
-  file: "tmemfiles2.nim"
+  disabled: "Windows"
   output: '''Full read size: 20
 Half read size: 10 Data: Hello'''
 """