The documentation for 'create_branch()' was incomplete as it didn't say
what certain parameters were used for. Further a parameter name wasn't
very communicative.

So, add missing documentation for the sake of completeness and easy
reference. Also, rename the concerned parameter to make its name more
communicative.

Signed-off-by: Kaartic Sivaraam <kaartic.sivar...@gmail.com>
---
 branch.c | 4 ++--
 branch.h | 7 ++++++-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/branch.c b/branch.c
index 62f7b0d8c..3e8d2f93f 100644
--- a/branch.c
+++ b/branch.c
@@ -228,7 +228,7 @@ N_("\n"
 "\"git push -u\" to set the upstream config as you push.");
 
 void create_branch(const char *name, const char *start_name,
-                  int force, int reflog, int clobber_head,
+                  int force, int reflog, int clobber_head_ok,
                   int quiet, enum branch_track track)
 {
        struct commit *commit;
@@ -244,7 +244,7 @@ void create_branch(const char *name, const char *start_name,
 
        if (validate_new_branchname(name, &ref, force,
                                    track == BRANCH_TRACK_OVERRIDE ||
-                                   clobber_head)) {
+                                   clobber_head_ok)) {
                if (!force)
                        dont_change_ref = 1;
                else
diff --git a/branch.h b/branch.h
index b07788558..cb6411f84 100644
--- a/branch.h
+++ b/branch.h
@@ -15,12 +15,17 @@
  *
  *   - reflog creates a reflog for the branch
  *
+ *   - clobber_head_ok allows the currently checked out (hence existing)
+ *     branch to be overwritten; without 'force', it has no effect.
+ *
+ *   - quiet suppresses tracking information
+ *
  *   - track causes the new branch to be configured to merge the remote branch
  *     that start_name is a tracking branch for (if any).
  */
 void create_branch(const char *name, const char *start_name,
                   int force, int reflog,
-                  int clobber_head, int quiet, enum branch_track track);
+                  int clobber_head_ok, int quiet, enum branch_track track);
 
 /*
  * Validates that the requested branch may be created, returning the
-- 
2.15.0.291.g0d8980c5d

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