Update doc to split summary and description

PiperOrigin-RevId: 346437905
Change-Id: I5ca39ac9078343bb24070b8ad9b1d81ef58259bb
diff --git a/tensorflow/core/api_def/base_api/api_def_InplaceAdd.pbtxt b/tensorflow/core/api_def/base_api/api_def_InplaceAdd.pbtxt
index 3654286..d5fde05 100644
--- a/tensorflow/core/api_def/base_api/api_def_InplaceAdd.pbtxt
+++ b/tensorflow/core/api_def/base_api/api_def_InplaceAdd.pbtxt
@@ -20,9 +20,8 @@
         "A `Tensor` of type T. An alias of `x`. The content "
         "of `y` is undefined if there are duplicates in `i`."
   }
-  summary: <<END
-    Adds v into specified rows of x.
-
+  summary: "Adds v into specified rows of x."
+  description: <<END
     Computes y = x; y[i, :] += v; return y.
 END
 }