tests: Trim .nim files trailing whitespace

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

tests/alias/talias.nim

@@ -6,7 +6,7 @@ type
 
 proc isPartOf*[S, T](a: S, b: T): TAnalysisResult {.
   magic: "IsPartOf", noSideEffect.}
-  ## not yet exported properly. 
+  ## not yet exported properly.
 
 template compileTimeAssert(cond: expr) =
   when not cond:
@@ -35,30 +35,30 @@ proc p(param1, param2: TC): TC =
     local: TC
     plocal: ptr TC
     plocal2: ptr TA
-    
+
   local.arr <| local
   local.arr[0] <| local
   local.arr[2] !<| local.arr[1]
-  
+
   plocal2[] ?<| local
 
   param1 ?<| param2
-  
+
   local.arr[0] !<| param1
   local.arr !<| param1
   local.le[] ?<| param1
-  
+
   param1 !<| local.arr[0]
   param1 !<| local.arr
   param1 ?<| local.le[]
-  
+
   result !<| local
   result <| result
 
 var
   a, b: int
   x: TC
-  
+
 a <| a
 a !<| b