new strange named branch created: org-name//org-name

[Uwe Brauer]

Hi 

I just run 

Hg log -G and saw

  changeset:   414:5fc7942bdb5e
│  Branch:      english//english
│  tag:         tip
│  Author:      Uwe Brauer <oub at mat.ucm.es>
│  Date:        Wed, 02 Dec 2020 10:00:34 +0100
│  Topic:       english
│  Phase:       draft
│  Summary:     Update footer (Local variables, british dictionary on)
│
â—‹  changeset:   413:955ffab363cf
│  Branch:      english//english
│  Author:      Uwe Brauer <oub at mat.ucm.es>
│  Date:        Wed, 02 Dec 2020 09:58:15 +0100
│  Topic:       english
│  Phase:       draft
│  Summary:     Actualize names
│
â—‹  changeset:   412:07cae438502e
│  Branch:      english//english
│  Author:      Uwe Brauer <oub at mat.ucm.es>
│  Date:        Wed, 02 Dec 2020 09:56:06 +0100
│  Topic:       english
│  Phase:       draft
│  Summary:     Actualize part5 (1)


Branch: english//english

I did not create. I have seen this strange behaviour in the past but
could not reproduce it. I reckon that the culprit is evolve, but I am
not sure how to reproduce it.

Has anybody seen  this?