remove some break line (#9716)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9716

Reviewed By: mrambacher

Differential Revision: D35026096

Pulled By: jay-zhuang

fbshipit-source-id: 296c38418e2bb7948d7802e439a08c6621bdb49b

include/rocksdb/utilities/transaction_db.h

@@ -160,8 +160,7 @@ struct TransactionDBOptions {
 
   // Increasing this value will increase the concurrency by dividing the lock
   // table (per column family) into more sub-tables, each with their own
-  // separate
-  // mutex.
+  // separate mutex.
   size_t num_stripes = 16;
 
   // If positive, specifies the default wait timeout in milliseconds when
@@ -171,8 +170,7 @@ struct TransactionDBOptions {
   // If 0, no waiting is done if a lock cannot instantly be acquired.
   // If negative, there is no timeout.  Not using a timeout is not recommended
   // as it can lead to deadlocks.  Currently, there is no deadlock-detection to
-  // recover
-  // from a deadlock.
+  // recover from a deadlock.
   int64_t transaction_lock_timeout = 1000;  // 1 second
 
   // If positive, specifies the wait timeout in milliseconds when writing a key

include/rocksdb/utilities/transaction_db_mutex.h

@@ -18,7 +18,6 @@ namespace ROCKSDB_NAMESPACE {
 //
 // To open a TransactionDB with a custom TransactionDBMutexFactory, set
 // TransactionDBOptions.custom_mutex_factory.
-
 class TransactionDBMutex {
  public:
   virtual ~TransactionDBMutex() {}