Remove trailing spaces (#665)

* Remove trailing spaces

* PR-665 -  Remove trailing spaces

- Updated not stable test t/pt-online-schema-change/preserve_triggers.t
- Updated utilities in bin directory

* PR-665 -  Remove trailing spaces

- Fixed typos

* PR-665 -  Remove trailing spaces

- Fixed typos

---------

Co-authored-by: Sveta Smirnova <sveta.smirnova@percona.com>

lib/Lmo.pm

@@ -81,7 +81,7 @@ sub extends {
 
 sub _load_module {
    my ($class) = @_;
-   
+
    # Try loading the class, but don't croak if we fail.
    (my $file = $class) =~ s{::|'}{/}g;
    $file .= '.pm';
@@ -115,7 +115,7 @@ sub has {
    my $caller = scalar caller();
 
    my $class_metadata = Lmo::Meta->metadata_for($caller);
-   
+
    for my $attribute ( ref $names ? @$names : $names ) {
       my %args   = @_;
       my $method = ($args{is} || '') eq 'ro'
@@ -135,16 +135,16 @@ sub has {
       # isa => Constraint,
       if ( my $type_check = $args{isa} ) {
          my $check_name = $type_check;
-         
+
          if ( my ($aggregate_type, $inner_type) = $type_check =~ /\A(ArrayRef|Maybe)\[(.*)\]\z/ ) {
             $type_check = Lmo::Types::_nested_constraints($attribute, $aggregate_type, $inner_type);
          }
-         
+
          my $check_sub = sub {
             my ($new_val) = @_;
             Lmo::Types::check_type_constraints($attribute, $type_check, $check_name, $new_val);
          };
-         
+
          $class_metadata->{$attribute}{isa} = [$check_name, $check_sub];
          my $orig_method = $method;
          $method = sub {