tests: Trim .nim files trailing whitespace

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

tests/misc/tpos.nim

@@ -2,34 +2,34 @@ discard """
   file: "tpos.nim"
   output: "6"
 """
-# test this particular function
-
-proc mypos(sub, s: string, start: int = 0): int =
-  var
-    i, j, M, N: int
-  M = sub.len
-  N = s.len
-  i = start
-  j = 0
-  if i >= N:
-    result = -1
-  else:
-    while true:
-      if s[i] == sub[j]:
-        inc(i)
-        inc(j)
-      else:
-        i = i - j + 1
-        j = 0
-      if (j >= M) or (i >= N): break
-    if j >= M:
-      result = i - M
-    else:
-      result = -1
-
-var sub = "hello"
-var s = "world hello"
-write(stdout, mypos(sub, s))
-#OUT 6
+# test this particular function
+
+proc mypos(sub, s: string, start: int = 0): int =
+  var
+    i, j, M, N: int
+  M = sub.len
+  N = s.len
+  i = start
+  j = 0
+  if i >= N:
+    result = -1
+  else:
+    while true:
+      if s[i] == sub[j]:
+        inc(i)
+        inc(j)
+      else:
+        i = i - j + 1
+        j = 0
+      if (j >= M) or (i >= N): break
+    if j >= M:
+      result = i - M
+    else:
+      result = -1
+
+var sub = "hello"
+var s = "world hello"
+write(stdout, mypos(sub, s))
+#OUT 6