lib: Trim .nim files trailing whitespace

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

lib/pure/memfiles.nim

@@ -33,7 +33,7 @@ type
 
     when defined(windows):
       fHandle: int
-      mapHandle: int 
+      mapHandle: int
     else:
       handle: cint
 
@@ -131,7 +131,7 @@ proc open*(filename: string, mode: FileMode = fmRead,
       fail(osLastError(), "error opening file")
 
     if newFileSize != -1:
-      var 
+      var
         sizeHigh = int32(newFileSize shr 32)
         sizeLow  = int32(newFileSize and 0xffffffff)
 
@@ -177,7 +177,7 @@ proc open*(filename: string, mode: FileMode = fmRead,
       rollback()
       if result.handle != 0: discard close(result.handle)
       raiseOSError(errCode)
-  
+
     var flags = if readonly: O_RDONLY else: O_RDWR
 
     if newFileSize != -1:
@@ -221,7 +221,7 @@ proc open*(filename: string, mode: FileMode = fmRead,
 proc close*(f: var MemFile) =
   ## closes the memory mapped file `f`. All changes are written back to the
   ## file system, if `f` was opened with write access.
-  
+
   var error = false
   var lastErr: OSErrorCode
 
@@ -245,7 +245,7 @@ proc close*(f: var MemFile) =
     f.mapHandle = 0
   else:
     f.handle = 0
-  
+
   if error: raiseOSError(lastErr)
 
 type MemSlice* = object  ## represent slice of a MemFile for iteration over delimited lines/records