tests: Trim .nim files trailing whitespace

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

tests/generics/texplicitgeneric1.nim

@@ -5,33 +5,33 @@ discard """
 # test explicit type instantiation
 
 type
-  TDict*[TKey, TValue] = object 
+  TDict*[TKey, TValue] = object
     data: seq[tuple[k: TKey, v: TValue]]
   PDict*[TKey, #with `==`(a, b: TKey): bool
-               #     hash(a: TKey): int, 
+               #     hash(a: TKey): int,
          TValue] = ref TDict[TKey, TValue]
-  
-proc newDict*[TKey, TValue](): PDict[TKey, TValue] = 
+
+proc newDict*[TKey, TValue](): PDict[TKey, TValue] =
   new(result)
   result.data = @[]
-  
-proc add*[TKey, TValue](d: PDict[TKey, TValue], k: TKey, v: TValue) = 
+
+proc add*[TKey, TValue](d: PDict[TKey, TValue], k: TKey, v: TValue) =
   d.data.add((k, v))
-  
-iterator items*[Tkey, TValue](d: PDict[TKey, TValue]): tuple[k: TKey, 
-               v: TValue] = 
+
+iterator items*[Tkey, TValue](d: PDict[TKey, TValue]): tuple[k: TKey,
+               v: TValue] =
   for k, v in items(d.data): yield (k, v)
-    
+
 var d = newDict[int, string]()
 d.add(12, "12")
 d.add(13, "13")
-for k, v in items(d): 
+for k, v in items(d):
   stdout.write("Key: ", $k, " value: ", v)
 
 var c = newDict[char, string]()
 c.add('A', "12")
 c.add('B', "13")
-for k, v in items(c): 
+for k, v in items(c):
   stdout.write(" Key: ", $k, " value: ", v)