Fix typo (#65)

cmd/bitcask/scan.go

@@ -14,7 +14,7 @@ import (
 var scanCmd = &cobra.Command{
 	Use:     "scan <prefix>",
 	Aliases: []string{"search", "find"},
-	Short:   "Perform a prefis scan for keys",
+	Short:   "Perform a prefix scan for keys",
 	Long: `This performa a prefix scan for keys  starting with the given
 prefix. This uses a Trie to search for matching keys and returns all matched
 keys.`,

options.go

@@ -101,7 +101,7 @@ func WithMaxValueSize(size int) Option {
 }
 
 // WithSync causes Sync() to be called on every key/value written increasing
-// durability and saftey at the expense of performance
+// durability and safety at the expense of performance
 func WithSync(sync bool) Option {
 	return func(cfg *config) error {
 		cfg.sync = sync