sbobject -p can bust the output depending on the contents of the string

[fidgetingbits]

We should probably test that the content is within a more restricted range, as this will break test and scripts parsing the output. In the example below the character that's being printed seems to have a
so (region start) moves to the line below.

pwndbg> sbobject 0xffff888109ae0000 -n kmalloc-256 -c 4 -p 0x10
0xffff888109ae0000 M 0x7500 ~
                              (region start)