Even when you have multiple signatures by multiple users in one
paragraph (or list item), it's still basically a single comment.
We don't want to offer multiple buttons to reply to it.
The changed parser test cases are illustrative:
* All affected comments in the "pl" example are comments with a
"post-scriptum", which is now more intuitively treated as part of
the main comment.
* The first comment in the "en" example would probably have been
better if it wasn't merged, but a weird use of the outdent template
causes us to not be able to distinguish that the two parts of the
comment display on separate lines.
* The last comment in the "en" example (isn't that neat?) was previously
incorrectly treated as two comments, because there's a timestamp in
the middle of it (the user is referring to another comment).
* Remaining affected comments in the "en" example are also comments
with a "post-scriptum" and their treatment is clearly better now.
It also accidentally fixes some problems with modifier tests (but not
all), where previously <dl> nodes would be inserted in the middle of
<p> nodes, to reply to the comments which are now merged.
Bug: T240640
Change-Id: I0f2d9238aff75d78286250affd323cd145661a11
Document the current behavior of the modifier (which inserts the
replies into the DOM tree), so that we can more easily see the effect
of changes in I2a70db01e9a8916c5636bc59ea8490166966d5ec.
Basically, add a reply to every comment, and dump the resulting HTML,
comparing it to previously generated expected HTML (which can be
checked visually). Have a look at the new HTML files.
Notably, the very first section in the "pl" example demonstrates a
case of wrong reply location due to list gap :) (T242822).
Change-Id: I4aed0f0b112f53d98e3fe1da4d40db8687c7e537
