Add support for that section to the YAML layer, and add code to update it. The updating is slightly tricky - unlike .debug_ranges, the size of entries is not fixed. So we can't just skip entries, as the end marker is smaller than a normal entry. Instead, replace now-invalid segments with (1, 1) which is of size 0 and so should be ignored by the debugger (we can't use (0, 0) as that would be an end marker, and (-1, *) is the special base marker). In the future we probably do want to do this in a more sophisticated manner, completely rewriting the indexes into the section as well. For now though this should be enough for when binaryen does not optimize (as we don't move/reorder anything). Note that this doesn't update the location description (like where on the wasm expression stack the value is). Again, that is correct for when binaryen doesn't optimize, but for fully optimized builds we would need to track things (which would be hard!). Also clean up some code that uses "Extra" instead of "Delimiter" that was missed before, and shorten some unnecessarily long names.