tests: Trim .nim files trailing whitespace

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

tests/array/tarray.nim

@@ -2,33 +2,33 @@ discard """
   file: "tarray.nim"
   output: "100124"
 """
-# simple check for one dimensional arrays
-
-type
-  TMyArray = array[0..2, int]
-  TMyRecord = tuple[x, y: int]
-
-proc sum(a: TMyarray): int =
-  result = 0
-  var i = 0
-  while i < len(a):
-    inc(result, a[i])
-    inc(i)
-
-proc sum(a: openarray[int]): int =
-  result = 0
-  var i = 0
-  while i < len(a):
-    inc(result, a[i])
-    inc(i)
-
-proc getPos(r: TMyRecord): int =
-  result = r.x + r.y
-
-write(stdout, sum([1, 2, 3, 4]))
-write(stdout, sum([]))
-write(stdout, getPos( (x: 5, y: 7) ))
-#OUT 10012
+# simple check for one dimensional arrays
+
+type
+  TMyArray = array[0..2, int]
+  TMyRecord = tuple[x, y: int]
+
+proc sum(a: TMyarray): int =
+  result = 0
+  var i = 0
+  while i < len(a):
+    inc(result, a[i])
+    inc(i)
+
+proc sum(a: openarray[int]): int =
+  result = 0
+  var i = 0
+  while i < len(a):
+    inc(result, a[i])
+    inc(i)
+
+proc getPos(r: TMyRecord): int =
+  result = r.x + r.y
+
+write(stdout, sum([1, 2, 3, 4]))
+write(stdout, sum([]))
+write(stdout, getPos( (x: 5, y: 7) ))
+#OUT 10012
 
 # bug #1669
 let filesToCreate = ["tempdir/fl1.a", "tempdir/fl2.b",