perldelta: Fix some single char C< >

perldelta: Fix some single char C< >

Some characters that should have been in C< > weren't.

Single character C< > should instead be C<" "> (where the space is any
character).  This is how they are displayed anyway in non-gui devices,
and in gui, the single character really doesn't stand out as distinct,
whereas longer strings tend to.  Though, I did add quotes around the
range operator "..", as that wasnt very distinct without them.

I removed the C<> from C<1>, as the 1 is a generic value.