"J.P." <jp@neverwas.me> writes:

> v3 (left-margin enhancement). Extend stamp-only text properties to
> leading white space on right-sided stamps occupying their own line.

This was installed as

  * 63d8b2a59a4 Make erc-fill-wrap work with left-sided stamps

Unfortunately, it introduced a regression involving CTCP ACTIONs from
consecutive speakers. To reproduce, say something in a target buffer,
then do a "/me something" immediately afterward. You'll see that ERC
inserts

  <nick> something
         something

instead of

  <nick> something
       * nick something

or

  <nick> something
  * nick something

The attached patch should fix this.