Make "O" work for vectors

* lispy.el (lispy--oneline): Update.

* lispy-test.el (lispy-oneline): Add test.

lispy-test.el

@@ -904,7 +904,9 @@ Insert KEY if there's no command."
   (should (string= (lispy-with "(defun abc (x)\n  \"def.\"\n  (+ x\n     x\n     x))|" "O")
                    "(defun abc (x) \"def.\" (+ x x x))|"))
   (should (string= (lispy-with "|(defun foo ()\n  ;; comment\n  (bar)\n  (baz))" "O")
-                   ";; comment\n|(defun foo () (bar) (baz))")))
+                   ";; comment\n|(defun foo () (bar) (baz))"))
+  (should (string= (lispy-with "[1\n 2\n 3\n 4\n 5]|" "O")
+                   "[1 2 3 4 5]|")))
 
 (ert-deftest lispy-multiline ()
   (should (string= (lispy-with "|(defun abc (x) \"def.\" (+ x x x) (foo) (bar))"

lispy.el

@@ -4,7 +4,7 @@
 
 ;; Author: Oleh Krehel <[email protected]>
 ;; URL: https://github.com/abo-abo/lispy
-;; Version: 0.23.0
+;; Version: 0.26.0
 ;; Keywords: lisp
 
 ;; This file is not part of GNU Emacs
@@ -2456,25 +2456,27 @@ When the sexp is top-level, insert an additional newline."
   "Remove newlines from EXPR.
 When IGNORE-COMMENTS is not nil, don't remove comments.
 Instead keep them, with a newline after each comment."
-  (lispy-mapcan-tree
-   (lambda (x y)
-     (cond ((equal x '(ly-raw newline))
-            y)
-           ((lispy--raw-comment-p x)
-            (if (null ignore-comments)
-                (progn
-                  (push x lispy--oneline-comments)
-                  y)
-              (if (equal (car y) '(ly-raw newline))
-                  (cons x y)
-                `(,x (ly-raw newline) ,@y))))
-           ((and (lispy--raw-string-p x)
-                 (null ignore-comments))
-            (cons `(ly-raw string ,(replace-regexp-in-string "\n" "\\\\n" (caddr x)))
-                  y))
-           (t
-            (cons x y))))
-   expr))
+  (if (vectorp expr)
+      (apply #'vector (lispy--oneline (mapcar #'identity expr)))
+    (lispy-mapcan-tree
+     (lambda (x y)
+       (cond ((equal x '(ly-raw newline))
+              y)
+             ((lispy--raw-comment-p x)
+              (if (null ignore-comments)
+                  (progn
+                    (push x lispy--oneline-comments)
+                    y)
+                (if (equal (car y) '(ly-raw newline))
+                    (cons x y)
+                  `(,x (ly-raw newline) ,@y))))
+             ((and (lispy--raw-string-p x)
+                   (null ignore-comments))
+              (cons `(ly-raw string ,(replace-regexp-in-string "\n" "\\\\n" (caddr x)))
+                    y))
+             (t
+              (cons x y))))
+     expr)))
 
 (defun lispy-oneline ()
   "Squeeze current sexp into one line.