more tests fixed

tests/stdlib/tmemlinesBuf.nim

@@ -1,6 +1,14 @@
+discard """
+output: "14"
+"""
+
 import memfiles
 var inp = memfiles.open("tests/stdlib/tmemlinesBuf.nim")
 var buffer: TaintedString = ""
+var lineCount = 0
 for line in lines(inp, buffer):
-  echo("#" & line & "#")
+  lineCount += 1
+
 close(inp)
+
+echo lineCount

tests/stdlib/tnativesockets.nim

@@ -1,3 +1,7 @@
+discard """
+outputsub: ""
+"""
+
 import nativesockets, unittest
 
 suite "nativesockets":
@@ -5,4 +9,3 @@ suite "nativesockets":
     let hostname = getHostname()
     check hostname.len > 0
     check hostname.len < 64
-

tests/stdlib/tparsopt.nim

@@ -1,4 +1,10 @@
-# Test the new parseopt module
+discard """
+disabled: true
+"""
+
+# this file has a type in the name, and it does not really test
+# parseopt module, because tester has no support to set arguments. Test the
+# new parseopt module. Therefore it is disabled.
 
 import
   parseopt