Fix typo (#298)

* Updated readme

* Fix typo in comment

Co-authored-by: Carlos Salguero <carlos.salguero@percona.com>

bin/pt-online-schema-change

@@ -4293,7 +4293,7 @@ sub recurse_to_slaves {
    my $slave_dsn = $dsn;
    if ($slave_user) {
       $slave_dsn->{u} = $slave_user;
-      PTDEBUG && _d("Using slave user $slave_user on ".$slave_dsn->{h}.":".$slave_dsn->{P});
+      PTDEBUG && _d("Using slave user $slave_user on ".$slave_dsn->{h}.":".($slave_dsn->{P}?$slave_dsn->{P}:""));
    }
    if ($slave_password) {
       $slave_dsn->{p} = $slave_password;

bin/pt-table-sync

@@ -9951,7 +9951,7 @@ sub main {
          $o->save_error("--conflict-comparison $cc requires --conflict-value")
       }
 
-      # Override --algorithms becuase only TableSyncChunk works with
+      # Override --algorithms because only TableSyncChunk works with
       # bidirectional syncing.
       $o->set('algorithms', 'Chunk');
       $o->set('buffer-to-client', 0);