D17866: Properly show "/" for %d tab title format

[Mariusz Glebocki]

mglb created this revision.
mglb added a reviewer: Konsole.
mglb added a project: Konsole.
mglb requested review of this revision.

REVISION SUMMARY
  `/` path was shown as empty string for %d format.

TEST PLAN
  - Use `%d` in tab title format
  - Run `cd /`
  
  **Actual result:** `%d` replaced with ``
  **Expected result:** `%d` replaced with `/`

REPOSITORY
  R319 Konsole

BRANCH
  arc/Properly-show-root-for-d-tab-title-format (branched from master)

REVISION DETAIL
  https://phabricator.kde.org/D17866

AFFECTED FILES
  src/ProcessInfo.cpp

To: mglb, #konsole
Cc: konsole-devel, thsurrel, ngraham, maximilianocuria, hindenburg
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