MODIFIED: Use =backtrace_show_lines= flag to derive the default for subgoal_positions(Boolean) in print_prolog_backtrace/3.
MODIFIED: Use =backtrace_show_lines= flag to derive the default for
subgoal_positions(Boolean) in print_prolog_backtrace/3.

mndrix/swipl-devel,edechter/swipl-devel,mndrix/swipl-devel,jn7163/swipl-devel,jn7163/swipl-devel,jn7163/swipl-devel,mndrix/swipl-devel,edechter/swipl-devel,mndrix/swipl-devel,mndrix/swipl-devel,edechter/swipl-devel,jn7163/swipl-devel,koryonik/swipl-devel,koryonik/swipl-devel,edechter/swipl-devel,edechter/swipl-devel,jn7163/swipl-devel,koryonik/swipl-devel,koryonik/swipl-devel,koryonik/swipl-devel