parse-options: adjust `parse_opt_unknown_cb()`s declared return type

diff --git a/worktree.h b/worktree.h
index 9e3b0b7b6f9bd2aad3de9094febb8ad76aa45caf..caecc7a281cc6778447a5c70bc7a756306bbbd3b 100644 (file)
--- a/worktree.h
+++ b/worktree.h
@@ -30,37 +30,37 @@ struct worktree {
  * The caller is responsible for freeing the memory from the returned
  * worktree(s).
  */
-extern struct worktree **get_worktrees(unsigned flags);
+struct worktree **get_worktrees(unsigned flags);
 
 /*
  * Returns 1 if linked worktrees exist, 0 otherwise.
  */
-extern int submodule_uses_worktrees(const char *path);
+int submodule_uses_worktrees(const char *path);
 
 /*
  * Return git dir of the worktree. Note that the path may be relative.
  * If wt is NULL, git dir of current worktree is returned.
  */
-extern const char *get_worktree_git_dir(const struct worktree *wt);
+const char *get_worktree_git_dir(const struct worktree *wt);
 
 /*
  * Search a worktree that can be unambiguously identified by
  * "arg". "prefix" must not be NULL.
  */
-extern struct worktree *find_worktree(struct worktree **list,
-                                     const char *prefix,
-                                     const char *arg);
+struct worktree *find_worktree(struct worktree **list,
+                              const char *prefix,
+                              const char *arg);
 
 /*
  * Return true if the given worktree is the main one.
  */
-extern int is_main_worktree(const struct worktree *wt);
+int is_main_worktree(const struct worktree *wt);
 
 /*
  * Return the reason string if the given worktree is locked or NULL
  * otherwise.
  */
-extern const char *worktree_lock_reason(struct worktree *wt);
+const char *worktree_lock_reason(struct worktree *wt);
 
 #define WT_VALIDATE_WORKTREE_MISSING_OK (1 << 0)
 
@@ -68,28 +68,28 @@ extern const char *worktree_lock_reason(struct worktree *wt);
  * Return zero if the worktree is in good condition. Error message is
  * returned if "errmsg" is not NULL.
  */
-extern int validate_worktree(const struct worktree *wt,
-                            struct strbuf *errmsg,
-                            unsigned flags);
+int validate_worktree(const struct worktree *wt,
+                     struct strbuf *errmsg,
+                     unsigned flags);
 
 /*
  * Update worktrees/xxx/gitdir with the new path.
  */
-extern void update_worktree_location(struct worktree *wt,
-                                    const char *path_);
+void update_worktree_location(struct worktree *wt,
+                             const char *path_);
 
 /*
  * Free up the memory for worktree(s)
  */
-extern void free_worktrees(struct worktree **);
+void free_worktrees(struct worktree **);
 
 /*
  * Check if a per-worktree symref points to a ref in the main worktree
  * or any linked worktree, and return the worktree that holds the ref,
  * or NULL otherwise. The result may be destroyed by the next call.
  */
-extern const struct worktree *find_shared_symref(const char *symref,
-                                                const char *target);
+const struct worktree *find_shared_symref(const char *symref,
+                                         const char *target);
 
 /*
  * Similar to head_ref() for all HEADs _except_ one from the current
@@ -104,8 +104,8 @@ int is_worktree_being_bisected(const struct worktree *wt, const char *target);
  * Similar to git_path() but can produce paths for a specified
  * worktree instead of current one
  */
-extern const char *worktree_git_path(const struct worktree *wt,
-                                    const char *fmt, ...)
+const char *worktree_git_path(const struct worktree *wt,
+                             const char *fmt, ...)
        __attribute__((format (printf, 2, 3)));
 
 /*