make run the default action of a test in tester

tests/misc/tendian.nim

@@ -1,3 +0,0 @@
-# test the new endian magic
-
-writeLine(stdout, repr(system.cpuEndian))

tests/misc/tgetstartmilsecs.nim

@@ -1,7 +1,6 @@
-#
 import times, os
 
 var start = epochTime()
 os.sleep(1000)
-
-echo epochTime() - start #OUT 1000
+let diff = abs(epochTime() - start - 1.0)
+doAssert diff < 0.005

tests/misc/thallo.nim

@@ -1,4 +1,8 @@
-# Hallo
+discard """
+action: compile
+"""
+
+# noted this seems to be an old test file designed for manual testing.
 
 import
   os, strutils, macros