Fixing minor typos in CommandRegistrar JavaDocs
/**
* {@link CommandRegistrar}s are the entry point for plugins wishing to provide
* their own command framework. The {@link CommandManager} will proxy calls to
- * the correct registrar amd will handle the final {@link CommandResult}.
+ * the correct registrar and will handle the final {@link CommandResult}.
*
* <p>This interface defines a way to register commands. This registration
* method <strong>must</strong> call
* always supply the mapping of the command being invoked at runtime. The alias
* that was matched will also be supplied.</p>
*
- * <p>For command that wishes to investigate the command string that was
+ * <p>For a command that wishes to investigate the command string that was
* executed, they may investigate the context in
* {@link CommandCause#cause()}, looking for the
* {@link EventContextKeys#COMMAND} context key.</p>
