[PATCH v7 0/2] Avoid submodule overwritten and skip redundant active entries

This series of patch covers mainly two areas

1. The bug report where after submodule was moved and the path remained same
   when a new submodule was added then it directly was overwriting the 
   moved submodule as the present submodule since the path matched.

2. The configure_added_submodule was writing submodule.<name>.active
   entry, even when the new path is already matched by submodule.active
   patterns.

Below is a helper function and 2 new tests with fixes of the above problem.

V7 has added Tab spaces in the test rather than 4 spaces in V6

Junio C Hamano (1):
  The seventeenth batch

K Jayatheerth (1):
  submodule: prevent overwriting .gitmodules entry on path reuse

 Documentation/RelNotes/2.50.0.adoc | 19 +++++++++++++++++++
 builtin/submodule--helper.c        | 28 ++++++++++++++++++++++++++++
 t/t7400-submodule-basic.sh         | 23 +++++++++++++++++++++++
 3 files changed, 70 insertions(+)