third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/java/core/src/main/java/com/google/protobuf/ByteOutput.java

Index: third_party/protobuf/java/core/src/main/java/com/google/protobuf/ByteOutput.java
diff --git a/third_party/protobuf/java/core/src/main/java/com/google/protobuf/ByteOutput.java b/third_party/protobuf/java/core/src/main/java/com/google/protobuf/ByteOutput.java
index 8b7b04c8c2c4d71c094a3bd6296f0a60d95c0f2a..ee5887538f58f9d198d978d244102e871b73e918 100644
--- a/third_party/protobuf/java/core/src/main/java/com/google/protobuf/ByteOutput.java
+++ b/third_party/protobuf/java/core/src/main/java/com/google/protobuf/ByteOutput.java
@@ -37,11 +37,11 @@ import java.nio.ByteBuffer;
  * An output target for raw bytes. This interface provides semantics that support two types of
  * writing:
  *
- * <p/><b>Traditional write operations:</b>
+ * <p><b>Traditional write operations:</b>
  * (as defined by {@link java.io.OutputStream}) where the target method is responsible for either
  * copying the data or completing the write before returning from the method call.
  *
- * <p/><b>Lazy write operations:</b> where the caller guarantees that it will never modify the
+ * <p><b>Lazy write operations:</b> where the caller guarantees that it will never modify the
  * provided buffer and it can therefore be considered immutable. The target method is free to
  * maintain a reference to the buffer beyond the scope of the method call (e.g. until the write
  * operation completes).