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to `mark_object'.

backend-specific code cleanly.
(vc-unregister): Function removed.

code.

unconditionally.
(vc-rcs-set-default-branch): New function.
(vc-rcs-cancel-version, vc-rcs-checkin, vc-rcs-checkout): Use it.
(vc-rcs-checkin): If an appropriate default branch has been set,
force creation of that branch.

(vc-revert-buffer): Delegate some of the work to it.

  echo area will now grow to accommodate them.
  [Note -- I thought I already checked this change, but it seems to have
   mysteriously disappeared]

  Document new features in constrain-to-field.
  Fix up some other entries.
  Remove entries for nonexistant functions.

  additional legal values for the :height attribute.

(back_comment): Check two-char comment markers more carefully
to better handle overlapping cases like *//* or /* */* */ ...
Match nestedness of ender/starter.

(Fforward_comment): Treat an unmatched \n comment-ender as whitespace.

highlighting overlay with a different face over the overlay
isearch uses to highlight the current match because that can lead
to bad face combinations.

(isearch): New defface; was already tested for in the code.
(isearch-lazy-highlight-face): Changed to defface from defcustom.
(isearch-highlight): Always use face `isearch'.

unused vars.  Treat byte-constant2 like byte-constant.  Fix bogus
comparison of opcode with operand.

backend, try that one first.

list.  Handle multiple backends correctly.
(vc-find-new-backend): Function removed.
(vc-register): Use vc-responsible-backend, as before.
(vc-next-action-on-file): Do use vc-registered, not vc-backend.

logo.

return with a string converted to an integer or vice versa when
Vmocklisp_arguments is t.
(Fsignal): Likewise.  The function can return for `quit'.
(struct gcpro): Declare member `var' to point to a volatile
Lisp_Object.

(diff-apply-hunk): Don't return a value.

(diff-test-hunk, diff-apply-hunk): Remove unneeded `let'.
(diff-test-hunk): Make the return value agree with the doc string.
(diff-apply-hunk): Only advance if `diff-advance-after-apply-hunk'.
(diff-advance-after-apply-hunk): New variable.

Use vc-backend rather than vc-registered.
(vc-next-action-on-file): Use intern-soft.
Deal with read-only *vc-diff* buffer.
(vc-switch-backend): Short circuit if nothing is to be done.
Handle the case where (not (memq backend backends)).
Don't use vc-resynch-buffer which could lose unsaved editing.
(vc-transfer-file): Docstring fix.

(edit-vc-file, vc-next-action-on-file): Don't use find-file.
(vc-find-new-backend): New function split from vc-responsible-backend.
(vc-register): Use it.
(vc-responsible-backend): Remove REGISTER arg and add BACKENDS arg.
(vc-unregister): Drop BACKEND arg (it doesn't work anyway).
(vc-default-unregister, vc-revert-buffer): Docstring fix.
(vc-clear-headers): Don't use find-file.
(vc-revert-buffer): Use `and' again (must have been a braino).
(vc-switch-backend): Only prompt if requested.
(vc-default-receive-file): Update call to vc-unregister.

* vc-rcs.el (vc-rcs-unregister): Keep a backup of the master file.
(vc-rcs-receive-file): Avoid with-vc-properties.
Update call to vc-unregister.
Use constant `RCS' rather than (dynamically bound) var `backend'.

files.

(vc-start-entry): New argument initial-contents.  Don't visit the file
if it isn't already visited.  Brought documentation up-to-date.
(vc-next-action, vc-register): Updated calls to vc-start-entry.
(vc-checkin): New optional arg initial-contents, which is passed to
vc-start-entry.
(vc-finish-logentry): Make sure to bury log buffer only if there
really is one.  Call `vc-resynch-buffer' on log-file, not
buffer-file-name.
(vc-default-comment-history, vc-default-wash-log): New functions.
(vc-index-of): Removed.
(vc-transfer-file): Make do without the above.
(vc-default-receive-file): Call comment-history unconditionally.  Pass
the resulting string to vc-checkin, instead of inserting it into the
comment ring.

comments as initial contents of the log entry buffer.  Document the
trick to force branch creation with no changes.