Fix typos in comments (#7790)

Summary:
Hi there,

This PR fixes some typos in comments.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7790

Reviewed By: ajkr

Differential Revision: D25684213

Pulled By: zhichao-cao

fbshipit-source-id: b77026018cbdd59c9db25aa73edeb359d9962f3e

include/rocksdb/compaction_filter.h

@@ -83,7 +83,7 @@ class CompactionFilter {
   //
   // Note that RocksDB snapshots (i.e. call GetSnapshot() API on a
   // DB* object) will not guarantee to preserve the state of the DB with
-  // CompactionFilter. Data seen from a snapshot might disppear after a
+  // CompactionFilter. Data seen from a snapshot might disappear after a
   // compaction finishes. If you use snapshots, think twice about whether you
   // want to use compaction filter and whether you are using it in a safe way.
   //
@@ -188,7 +188,7 @@ class CompactionFilter {
 
   // This function is deprecated. Snapshots will always be ignored for
   // compaction filters, because we realized that not ignoring snapshots doesn't
-  // provide the gurantee we initially thought it would provide. Repeatable
+  // provide the guarantee we initially thought it would provide. Repeatable
   // reads will not be guaranteed anyway. If you override the function and
   // returns false, we will fail the compaction.
   virtual bool IgnoreSnapshots() const { return true; }

include/rocksdb/configurable.h

@@ -240,7 +240,7 @@ class Configurable {
   // @param config_options Controls how the object is prepared.  Also contains
   //      a Logger and Env that can be used to initialize this object.
   // @return OK If the object was successfully initialized.
-  // @return InvalidArgument If this object could not be successfull
+  // @return InvalidArgument If this object could not be successfully
   // initialized.
   virtual Status PrepareOptions(const ConfigOptions& config_options);
 

include/rocksdb/file_checksum.h

@@ -76,7 +76,7 @@ class FileChecksumGenFactory {
 };
 
 // FileChecksumList stores the checksum information of a list of files (e.g.,
-// SST files). The FileChecksumLIst can be used to store the checksum
+// SST files). The FileChecksumList can be used to store the checksum
 // information of all SST file getting  from the MANIFEST, which are
 // the checksum information of all valid SST file of a DB instance. It can
 // also be used to store the checksum information of a list of SST files to