Add exception filename to title bar

Add the exception filename after the line number and change the
line number so it is in that file. It used to always be code.py.

Fixes adafruit#6702

main.c

@@ -213,8 +213,9 @@ void supervisor_execution_status(void) {
     if (_current_executing_filename != NULL) {
         serial_write(_current_executing_filename);
     } else if ((_exec_result.return_code & PYEXEC_EXCEPTION) != 0 &&
+               _exec_result.exception_line > 0 &&
                exception != NULL) {
-        mp_printf(&mp_plat_print, "@%d %q", _exec_result.exception_line, exception->base.type->name);
+        mp_printf(&mp_plat_print, "@%d %s %q", _exec_result.exception_line, _exec_result.exception_filename, exception->base.type->name);
     } else {
         serial_write_compressed(translate("Done"));
     }

shared/runtime/pyexec.c

@@ -199,7 +199,9 @@ STATIC int parse_compile_execute(const void *source, mp_parse_input_kind_t input
                 size_t n, *values;
                 mp_obj_exception_get_traceback(return_value, &n, &values);
                 if (values != NULL) {
-                    result->exception_line = values[n - 2];
+                    result->exception_line = values[1];
+                    result->exception_filename[sizeof(result->exception_filename) - 1] = '\0';
+                    strncpy(result->exception_filename, qstr_str(values[0]), sizeof(result->exception_filename) - 1);
                 }
             }
         }

shared/runtime/pyexec.h

@@ -37,6 +37,9 @@ typedef struct {
     int return_code;
     mp_obj_t exception;
     int exception_line;
+    // Only store the first 32 characters of the filename. It is very unlikely that they can all be
+    // seen.
+    char exception_filename[33];
 } pyexec_result_t;
 
 extern pyexec_mode_kind_t pyexec_mode_kind;