GitLab

It should help with some Jessie failures related to arrays of floating-point numbers.

this includes Alt-Ergo both 0.94 and 0.95, and CVC4

remove the keyword "cloned" from drivers, since it becomes
the default and only behaviour (the same for prelude strings).

Also, remove obsolete Printer.print_prelude_for_theory.

File "why3/modules/array.mlw", line 141, characters 2-26:
warning: cloned theory map.MapPermut does not contain any abstract symbol; it should be used instead

Note that warn_clone_not_abstract is not called from clone_export so that
the location of the declaration can be passed.

these return the newly created symbol, saving us a pattern matching
in let_defn.