[PATCH v5 0/5] Fixes for Documentation/MyFirstObjectWalk.txt

The fifth round with the correction that a list itself cannot have performance implications -- asking for one may have.

---
Changes in v5:
* Rephrase implications that asking for an `omitted` list
  may have in [4/5]

Changes in v4:
* Used the proper `git show` for references in [1/5] and [3/5]
* Another attempt to write clear speach in [4/5]

Changes in v3:
* Reword the description in [4/5]
* Add a missing slash in [5/5]

Changes in v2:
* Added Emily to Cc in the hope for a review
* Remove superfluous tags from [1/5] and [3/5]
* Replace bashism `|&` by `2>&1 |` in [5/5]
---
Dirk Gouders (5):
  MyFirstObjectWalk: use additional arg in config_fn_t
  MyFirstObjectWalk: fix misspelled "builtins/"
  MyFirstObjectWalk: fix filtered object walk
  MyFirstObjectWalk: fix description for counting omitted objects
  MyFirstObjectWalk: add stderr to pipe processing

 Documentation/MyFirstObjectWalk.txt | 37 ++++++++++++++++-------------
 1 file changed, 21 insertions(+), 16 deletions(-)

Range-diff against v4:
1:  2501fea789 = 1:  292ae67548 MyFirstObjectWalk: use additional arg in config_fn_t
2:  6b336e15d6 = 2:  99284db8c1 MyFirstObjectWalk: fix misspelled "builtins/"
3:  83034594e2 = 3:  e1b4a4c996 MyFirstObjectWalk: fix filtered object walk
4:  f23ff9fd1b ! 4:  e6030f1c0a MyFirstObjectWalk: fix description for counting omitted objects
    @@ Documentation/MyFirstObjectWalk.txt: points to the same tree object as its grand
     -reachable objects are walked in order to populate the list.
     +filter, like with `git log --filter=<spec> --filter-print-omitted`. To do this,
     +change `traverse_commit_list()` to `traverse_commit_list_filtered()`, which is
    -+able to populate an `omitted` list.  This list of filtered objects may have
    -+performance implications, however, because despite filtering objects, the possibly
    -+much larger set of all reachable objects must be processed in order to
    -+populate that list.
    ++able to populate an `omitted` list.  Asking for this list of filtered objects
    ++may cause performance degradations, however, because in this case, despite
    ++filtering objects, the possibly much larger set of all reachable objects must
    ++be processed in order to populate that list.
      
      First, add the `struct oidset` and related items we will use to iterate it:
      
5:  582cb7d44a = 5:  0a3dbd1452 MyFirstObjectWalk: add stderr to pipe processing