The Perl data structures and objects pretty printer Data::Printer would trim strings longer than 4096 characters (this is the default value).

This is something that can be parameterized in the ~/.dataprinter file:

# No limit!
string_max        = 0

This default is sensible, though, because you usually don't want the program output to fill with too much text.

It might be necessary to change this value, only in a specific place. You can pass a false value to string_max to display the whole string fields:

p $object_with_long_string_values, string_max => 0;

More information can be found in the module Customization section, along with all the available configuration parameters.