perlpacktut: Remove some jargon

Fixes Perl#22697

Author: khwilliamson

pod/perlpacktut.pod

@@ -42,9 +42,9 @@ of these two functions.
 To see how (un)packing works, we'll start with a simple template
 code where the conversion is in low gear: between the contents of a byte
 sequence and a string of hexadecimal digits. Let's use C<unpack>, since
-this is likely to remind you of a dump program, or some desperate last
-message unfortunate programs are wont to throw at you before they expire
-into the wild blue yonder. Assuming that the variable C<$mem> holds a 
+this is likely to remind you of a dump program, or some terse panic
+message you might get as a program crashes. Assuming that the variable
+C<$mem> holds a 
 sequence of bytes that we'd like to inspect without assuming anything 
 about its meaning, we can write