^^^^^
- Honor backspaces on captions in scc files
- When mid-row codes which are preceded by a PAC command don't add spaces
- Mid row codes which don't follow after a PAC and don't have a style reset command before will add a space to the end of the previous text node
- Mid row codes which don't follow after a PAC and have a style reset command before will add a space to the beginning of the next text node
- Background color codes to delete the space in front