String manipulation is frustrating [fixed]

from blog Lisp journey, | ↗ original
One of the first things I wanted to do in the REPL was some string manipulation. But it was tedious. To trim whitespace, and I mean all whitespaces, we had to define #\Space #\Newline #\Backspace #\Tab #\Linefeed #\Page #\Return #\Rubout. To concatenate two strings: either giving an unusual 'string argument to concatenate, like this: (concatenate...