Added missing TRACE commands to the Tcl RDE engine backend.
Extended the parser generation and test setup so that we can see all pieces, including the test input, and grammar name in the make-parser
Extended coverage, simple sequence accessed through a symbol. This already shows an issue with error handling when using a plain sequence. An error at the beginning is shown as symbol error (n N). A later error in the sequence is shown as terminal error (t c). The issue is in the "i_error_nonterminal" and how it merges. The conflicting goals are "report error at farthest position" vs "report a highlevel error (symbol)". Currently resolved in favor of "farthest", test case uses "symbol" instead, to demonstrate the conflict. If we wish to have both farthest and nice we have to redo the data structures to accomodate storage of errors at different locations, which are related. This requires more thoughts.
Extended the tracing in the Tcl RDE backend, show arguments, and more details in i_error_nonterminal