add .clang-format

Change-Id: I6627b5569c2e0f730be7331403218b823a2c622f
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/notimpl/writeonly.hpp b/notimpl/writeonly.hpp
index 4c26fbd..6dc7afd 100644
--- a/notimpl/writeonly.hpp
+++ b/notimpl/writeonly.hpp
@@ -3,13 +3,12 @@
 
 #include "interfaces.hpp"
 
-
-class WriteOnly: public ReadInterface
+class WriteOnly : public ReadInterface
 {
-    public:
-        WriteOnly()
-            : ReadInterface()
-        { }
+  public:
+    WriteOnly() : ReadInterface()
+    {
+    }
 
-        ReadReturn read(void) override;
+    ReadReturn read(void) override;
 };