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Pack pac -- prolog/misc/find-pred.pl
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This module implements the generic editor interface. It consists of two extensible parts with little in between. The first part deals with translating the input into source-location, and the second with starting an editor.

 locate(+Spec, -FullSpec, -Location)[multifile]
 locate(+Spec, -Location)[multifile]
Locate object from the specified location.
 edit_command(+Editor, -Command)[multifile]
This predicate should specify the shell-command called to invoke the user's editor. The following substitutions will be made:
%ePath name of the editor
%fPath name of the file to be edited
%dLine number of the target
 select_location(+Pairs, +UserSpec, -Location)[multifile]