我一直在尝试配置Emacs，使其在缩进Ruby代码时插入“制表符”而不是一系列“空格”。
到目前为止，我已经尝试设置变量ruby-indent-tabs-mode为t，根据文档，如果这个变量非空，则会“在ruby模式中插入制表符”。但是到目前为止还没有成功。
我还尝试通过Easy customisation进行自定义，它将以下内容插入到我的init.el中：
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(ruby-indent-tabs-mode t))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)
通过 C-h v 检查变量后，它报告变量设置为t，但按下 TAB 仍然插入空格。
我甚至尝试编辑 ruby-mode 的 .el 文件并重新编译，但没有效果。
希望得到帮助。
----- 编辑 -----
这是通过 C-h m 报告的活动次要模式：
启用的次要模式：Abbrev Auto-Complete Auto-Composition
Auto-Compression Auto-Encryption File-Name-Shadow Font-Lock
Global-Auto-Complete Global-Font-Lock Inf-Ruby Line-Number Menu-Bar
Show-Smartparens Show-Smartparens-Global Smartparens
Smartparens-Global Transient-Mark
init.el 文件当前有：
(require 'cask "/Users/snowingheart/.cask/cask.el")
(cask-initialize)
(require 'pallet)
(add-to-list 'load-path "~/elisp")
(load "php-mode")
(add-to-list 'auto-mode-alist
'("\\.php[34]?\\'\\|\\.phtml\\'" . php-mode))
(global-set-key (kbd "C-x <up>") 'windmove-up)
(global-set-key (kbd "C-x <down>") 'windmove-down)
(global-set-key (kbd "C-x <right>") 'windmove-right)
(global-set-key (kbd "C-x <left>") 'windmove-left)
(require 'package)
(add-to-list 'package-archives
'("marmalade" .
"http://marmalade-repo.org/packages/"))
(package-initialize)
(global-set-key (kbd "C-x >") 'mc/mark-next-like-this)
(global-set-key (kbd "C-x <") 'mc/mark-previous-like-this)
(global-set-key (kbd "C-c C-<") 'mc/mark-all-like-this)
(global-set-key (kbd "C-S-c C-S-c") 'mc/edit-lines)
(require 'smartparens-config)
(require 'smartparens-ruby)
(require 'smartparens-erb)
(smartparens-global-mode)
(show-smartparens-global-mode t)
(sp-with-modes '(rhtml-mode)
(sp-local-pair "<%=" "%>")
(sp-local-pair "<%-" "%>"))
(require 'auto-complete-config)
(add-to-list 'ac-dictionary-directories
"~/.emacs.d/.cask/24.3.50.1/elpa/auto-complete-20130724.1750/dict")
(ac-config-default)
(setq ac-ignore-case nil)
(add-to-list 'ac-modes 'enh-ruby-mode)
(add-to-list 'ac-modes 'web-mode)
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(indent-tabs-mode t)
'(ruby-indent-tabs-mode t))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)
(setq-default indent-tabs-mode t)
(setq enh-ruby-indent-tabs-mode t)
(smart-tabs-insinuate 'ruby)
(smart-tabs-advice ruby-indent-line ruby-indent-level)
(setq ruby-indent-tabs-mode t)