tests: Trim .nim files trailing whitespace

via OSX: find . -name '*.nim' -exec sed -i '' -E 's/[[:space:]]+$//' {} +

tests/metatype/ttypedesc1.nim

@@ -1,6 +1,6 @@
 import unittest, typetraits
 
-type 
+type
   TFoo[T, U] = object
     x: T
     y: U
@@ -21,17 +21,17 @@ proc foo(T: typedesc[int or bool]): string =
 template foo(T: typedesc[seq]): expr = "seq"
 
 test "types can be used as proc params":
-  # XXX: `check` needs to know that TFoo[int, float] is a type and 
+  # XXX: `check` needs to know that TFoo[int, float] is a type and
   # cannot be assigned for a local variable for later inspection
   check ((string.getTypeName == "string"))
   check ((getTypeName(int) == "int"))
-  
+
   check ((foo(TFoo[int, float], 1000) == "TFoo 1000"))
-  
+
   var f = 10.0
   check ((foo(float, "long string") == "float true"))
   check ((foo(type(f), [1, 2, 3]) == "float false"))
-  
+
   check ((foo(int) == "int or bool 10"))
 
   check ((foo(seq[int]) == "seq"))