Unescaped vertical bar in values does not work

[olofhagsand]

Example, given clispec:
set <string>;
and the assignment:
cli> set a|b
Expected result:
The value a|b is accepted
Actual result:
CLI syntax error in: "set a|b": Unknown command
If the vertical bar is escaped, it works fine:

  cli> set "a|b"
  cli> set a\|b

[olofhagsand]

Workaround: escape all vertical bars in values.
Considering documenting this, and keep it as is, since there are plans to make multiple pipes:
a | b | c
where it will be more difficult to differentiate between vertical bars in values and as pipe characters

[olofhagsand]

Vertical bar should be escaped, modified tutorial and tests.