From 32a15ed90c17a4865cf0d0e070b8ba09f307ebd6 Mon Sep 17 00:00:00 2001
From: Lei Wang <bestwanglei@gmail.com>
Date: Wed, 16 May 2018 17:38:33 -0700
Subject: [PATCH] Doc: fix missing parenthesis. (#10726)

---
 doc/fluid/design/concepts/functions_operators_layers.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/fluid/design/concepts/functions_operators_layers.md b/doc/fluid/design/concepts/functions_operators_layers.md
index 30bc488a1..1f86b99e5 100644
--- a/doc/fluid/design/concepts/functions_operators_layers.md
+++ b/doc/fluid/design/concepts/functions_operators_layers.md
@@ -40,7 +40,7 @@ template <typename T>
 class FCOp : public OperatorBase {
  public:
   void Run(...) {
-    add(mul(Input<T>("X"), Input<T>("W")), Input<T>("b");
+    add(mul(Input<T>("X"), Input<T>("W")), Input<T>("b"));
   }
 };
 REGISTER_OP(FCOp, "fc");
-- 
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