tools: Trim .nim files trailing whitespace

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

tools/restorecc.nim

@@ -1,16 +1,16 @@
 
 import os, strutils
 
-proc main(dir: string, wanted: string) =
-  for kind, path in walkDir(dir):
-    case kind
+proc main(dir: string, wanted: string) =
+  for kind, path in walkDir(dir):
+    case kind
     of pcFile:
       let name = extractFilename(path)
       if name == wanted:
         let newLoc = path.replace("mingw_backup", "mingw")
         echo "creating ", newLoc
-        copyFile(path, newLoc)
-    of pcDir: main(path, wanted)
-    else: discard
+        copyFile(path, newLoc)
+    of pcDir: main(path, wanted)
+    else: discard
 
 main("dist/mingw_backup", paramStr(1))