chore: remove redundant words in comment

db/db_impl/db_impl_write.cc

@@ -455,7 +455,7 @@ Status DBImpl::WriteImpl(const WriteOptions& write_options,
                                      : WriteBatchInternal::Count(my_batch);
     uint64_t seq = 0;
     // Use a write thread to i) optimize for WAL write, ii) publish last
-    // sequence in in increasing order, iii) call pre_release_callback serially
+    // sequence in increasing order, iii) call pre_release_callback serially
     Status status = WriteImplWALOnly(
         &write_thread_, write_options, my_batch, callback, user_write_cb,
         log_used, log_ref, &seq, sub_batch_cnt, pre_release_callback,

java/src/main/java/org/rocksdb/RocksDB.java

@@ -1898,7 +1898,7 @@ public int get(final byte[] key, final byte[] value) throws RocksDBException {
    * @param vOffset the offset of the "value" array to be used, must be
    *     non-negative and no longer than "value".length
    * @param vLen the length of the "value" array to be used, must be
-   *     non-negative and and no larger than ("value".length -  offset)
+   *     non-negative and no larger than ("value".length -  offset)
    *
    * @return The size of the actual value that matches the specified
    *     {@code key} in byte.  If the return value is greater than the
@@ -2066,7 +2066,7 @@ public int get(final ColumnFamilyHandle columnFamilyHandle,
    * @param offset the offset of the "key" array to be used, must be
    *     non-negative and no larger than "key".length
    * @param len the length of the "key" array to be used, must be
-   *     non-negative and and no larger than ("key".length -  offset)
+   *     non-negative and no larger than ("key".length -  offset)
    * @param value the out-value to receive the retrieved value.
    * @param vOffset the offset of the "value" array to be used, must be
    *     non-negative and no longer than "key".length

util/filelock_test.cc

@@ -69,7 +69,7 @@ class LockTest : public testing::Test {
       int fd = open(file_.c_str(), O_RDWR | O_CREAT, 0644);
       if (fd < 0) {
         // could not open file, could not check if it was locked
-        fprintf(stderr, "Open on on file %s failed.\n", file_.c_str());
+        fprintf(stderr, "Open on file %s failed.\n", file_.c_str());
         exit(exit_val);
       }