stdlib: minor changes to avoid compiler warnings

lib/pure/asyncdispatch.nim

@@ -1125,7 +1125,7 @@ else:
 
   proc unregister*(ev: AsyncEvent) =
     getGlobalDispatcher().selector.unregister(SelectEvent(ev))
-  
+
   proc contains*(disp: PDispatcher, fd: AsyncFd): bool =
     return fd.SocketHandle in disp.selector
 
@@ -1514,7 +1514,7 @@ proc poll*(timeout = 500) =
   discard runOnce(timeout)
 
 # Common procedures between current and upcoming asyncdispatch
-include includes.asynccommon
+include includes/asynccommon
 
 proc sleepAsync*(ms: int | float): Future[void] =
   ## Suspends the execution of the current async procedure for the next

lib/pure/asyncfutures.nim

@@ -250,7 +250,7 @@ proc `$`*(entries: seq[StackTraceEntry]): string =
         indent.inc(2)
       else:
         indent.dec(2)
-        result.add(spaces(indent)& "]#\n")
+        result.add(spaces(indent) & "]#\n")
       continue
 
     let left = "$#($#)" % [$entry.filename, $entry.line]

lib/pure/random.nim

@@ -66,7 +66,7 @@ proc skipRandomNumbers*(s: var Rand) =
     s0 = ui 0
     s1 = ui 0
   for i in 0..high(helper):
-    for b in 0..< 64:
+    for b in 0 ..< 64:
       if (helper[i] and (ui(1) shl ui(b))) != 0:
         s0 = s0 xor s.a0
         s1 = s1 xor s.a1