Inline replies like these:

May become visually separated on later diffs:

Rough steps are:

• Generate diff A.
• Change a bunch of lines.
• Generate diff B.
• Change a bunch of lines.
• Generate diff C.
• Add an inline comment on A in the changed section.
• View B.
• Reply to the inline.
• View C.

The reply is against diff B, while the original is against diff A. This can cause the ghost-porting algorithm to choose different destinations.

Instead, replies should just be against the same diff so they always port to the same place.