display-accts: switch to f-strings

BUG=None
TEST=`./display-accts.py` output is the same

Change-Id: I644e6c62b098e3b03f092545026b9e52525e2ee8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/4112142
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Allen Webb <allenwebb@google.com>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
1 file changed
tree: ee2cc64c5c1eedcb0165787da5d35a32a19ea147
  1. acct-group/
  2. acct-user/
  3. eclass/
  4. metadata/
  5. profiles/
  6. OWNERS
  7. PRESUBMIT.cfg