D6720: config: fix fm.data() handling of defaultvalue

[pulkit (Pulkit Goyal)]

pulkit added inline comments.

INLINE COMMENTS

> navaneeth.suresh wrote in commands.py:1884
> I did this but, couldn't see a difference in the test output.

ah, I guess the output is sorted. Anyway, the suggested one is a correct way to do this, because otherwise we are writing name to fm two times in case of `uniquesel`.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D6720/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D6720

To: navaneeth.suresh, #hg-reviewers
Cc: pulkit, mercurial-devel