worktree: fix option descriptions for `prune`

diff --git a/strbuf.h b/strbuf.h
index 01c5c6371b8e43686f335704a67a59a1d82dbe3b..4a48c0031a7c0df6a7efdb2151d5701dd256fa28 100644 (file)
--- a/strbuf.h
+++ b/strbuf.h
@@ -365,7 +365,7 @@ extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
  * Read the contents of a file, specified by its path. The third argument
  * can be used to give a hint about the file size, to avoid reallocs.
  */
-extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
+extern ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 
 /**
  * Read the target of a symbolic link, specified by its path.  The third