Add WeakSpace to Mathlib.lean

Author: mike1729

Mathlib.lean

@@ -2097,6 +2097,7 @@ public import Mathlib.Analysis.Normed.Module.Shrink
 public import Mathlib.Analysis.Normed.Module.Span
 public import Mathlib.Analysis.Normed.Module.TransferInstance
 public import Mathlib.Analysis.Normed.Module.WeakDual
+public import Mathlib.Analysis.Normed.Module.WeakSpace
 public import Mathlib.Analysis.Normed.MulAction
 public import Mathlib.Analysis.Normed.Operator.Asymptotics
 public import Mathlib.Analysis.Normed.Operator.Banach