Context needed for newline marker

[svenssonaxel]

For high readability, each line should preferably be possible to interpret on it's own, with no context. This is not the case for content lines, as the status markers +, - and are used in both hintful and unified diff format. This means, that looking at the line +hello$, a user is unable to tell whether this adds hello\n (hintful) or hello$\n (unified), without going back to the hunk header or getting help from a highlighter.

[svenssonaxel]

This is partly alleviated by highlighting.

[svenssonaxel]

Strictly speaking, this problem is already present in unified diff format, since the --- and +++ lines can be confused with - and + content lines given no context. Some highlighters would work faster if lines could be interpreted on their own, but at least we aren't introducing this problem.