diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index f8d63d1498a..6516c91de3c 100644
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -63,15 +63,15 @@
 ;;
 ;; When using SCCS, RCS, CVS: be careful not to do repo surgery, or
 ;; operations like registrations and deletions and renames, outside VC
-;; while VC is running. The support for these systems was designed
+;; while VC is running.  The support for these systems was designed
 ;; when disks were much slower, and the code maintains a lot of
 ;; internal state in order to reduce expensive operations to a
-;; minimum. Thus, if you mess with the repo while VC's back is turned,
+;; minimum.  Thus, if you mess with the repo while VC's back is turned,
 ;; VC may get seriously confused.
 ;;
 ;; When using Subversion or a later system, anything you do outside VC
 ;; *through the VCS tools* should safely interlock with VC
-;; operations. Under these VC does little state caching, because local
+;; operations.  Under these VC does little state caching, because local
 ;; operations are assumed to be fast.
 ;;
 ;; The 'assumed to be fast' category includes SRC, even though it's
@@ -235,7 +235,7 @@
 ;;
 ;; * checkin (files comment &optional rev)
 ;;
-;;   Commit changes in FILES to this backend. COMMENT is used as a
+;;   Commit changes in FILES to this backend.  COMMENT is used as a
 ;;   check-in comment.  The implementation should pass the value of
 ;;   vc-checkin-switches to the backend command.  The optional REV
 ;;   revision argument is only supported with some older VCSes, like
@@ -257,7 +257,7 @@
 ;;   that means to check out the head of the current branch; if it is
 ;;   the empty string, check out the head of the trunk.  The
 ;;   implementation should pass the value of vc-checkout-switches to
-;;   the backend command. The 'editable' argument of older VC versions
+;;   the backend command.  The 'editable' argument of older VC versions
 ;;   is gone; all files are checked out editable.
 ;;
 ;; * revert (file &optional contents-done)
@@ -543,8 +543,8 @@
 ;;; Changes from the pre-25.1 API:
 ;;
 ;; - INCOMPATIBLE CHANGE: The 'editable' optional argument of
-;;   vc-checkout is gone. The upper level assumes that all files are
-;;   checked out editable. This moves closer to emulating modern
+;;   vc-checkout is gone.  The upper level assumes that all files are
+;;   checked out editable.  This moves closer to emulating modern
 ;;   non-locking behavior even on very old VCSes.
 ;;
 ;; - INCOMPATIBLE CHANGE: The vc-register function and its backend
@@ -577,11 +577,11 @@
 ;;   only affected back ends were SCCS and RCS.
 ;;
 ;; - vc-stay-local-p and repository-hostname are no longer part
-;;   of the public API. The vc-cvs-stay-local configuration variable
+;;   of the public API.  The vc-cvs-stay-local configuration variable
 ;;   remains and only affects the CVS back end.
 ;;
 ;; - The init-revision function and the default-initial-revision
-;;   variable are gone.  These have't made sense on anything shipped
+;;   variable are gone.  These haven't made sense on anything shipped
 ;;   since RCS, and using them was a dumb stunt even on RCS.
 ;;
 ;; - workfile-unchanged-p is no longer a public back-end method.  It
@@ -596,11 +596,11 @@
 ;;   when set to the (non-default) value nil.  The original justification
 ;;   for it (saving disk space) is long obsolete.
 ;;
-;; - The rollback method (implemented by RCS and SCCS only) is gone. See
+;; - The rollback method (implemented by RCS and SCCS only) is gone.  See
 ;;   the to-do note on uncommit.
 ;;
-;; - latest-on-branch-p is no longer a public method. It was to be used
-;;   for implementing rollback. RCS keeps its implementation (the only one)
+;; - latest-on-branch-p is no longer a public method.  It was to be used
+;;   for implementing rollback.  RCS keeps its implementation (the only one)
 ;;   for internal use.
 
 
@@ -627,7 +627,7 @@
 ;; - Make sure the *vc-dir* buffer is updated after merge-branch operations.
 ;;
 ;; - add a generic mechanism for remembering the current branch names,
-;;   display the branch name in the mode-line. Replace
+;;   display the branch name in the mode-line.  Replace
 ;;   vc-cvs-sticky-tag with that.
 ;;
 ;; - Add a primitives for switching to a branch (creating it if required.
@@ -644,7 +644,7 @@
 ;;
 ;; - Second, `log-view-modify-change-comment' doesn't seem to support
 ;;   modern backends at all because `log-view-extract-comment'
-;;   unconditionally calls `log-view-current-file'. This should be easy to
+;;   unconditionally calls `log-view-current-file'.  This should be easy to
 ;;   fix.
 ;;
 ;; - Third, doing message editing in log-view might be a natural way to go
@@ -687,7 +687,7 @@
 ;; - add a function that calls vc-dir to `find-directory-functions'.
 ;;
 ;; - vc-diff, vc-annotate, etc. need to deal better with unregistered
-;;   files. Now that unregistered and ignored files are shown in
+;;   files.  Now that unregistered and ignored files are shown in
 ;;   vc-dir, it is possible that these commands are called
 ;;   for unregistered/ignored files.
 ;;