Merge branch 'feature/andre/nonterm-warn-categories' into 'master'

src/plugins/nonterm/nonterm_run.ml

...nterm/tests/nonterm/oracle/builtin_termination.res.oracle

...plugins/nonterm/tests/nonterm/oracle/callstack.res.oracle

...lugins/nonterm/tests/nonterm/oracle/callstacks.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/n2.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/n5.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/n7.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/n8.0.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/n8.1.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/n9.res.oracle

...ns/nonterm/tests/nonterm/oracle/output_to_file.res.oracle

src/plugins/nonterm/tests/nonterm/oracle/output_to_file.txt