Use correctly the after directory

after/ftplugin/ruby/keys.vim

@@ -0,0 +1 @@
+map <F9> :w<CR>:!ruby -c %<CR>

after/ftplugin/ruby/prefs.vim

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+" ----- [ Preferences for ruby ] -----
+
+" show cursor
+setlocal cursorline cursorcolumn
+hi CursorLine term=none cterm=none
+
+" show line numbers
+setlocal number numberwidth=4
+
+" show matching parentheses
+setlocal showmatch
+
+" indent
+setlocal autoindent cindent smartindent
+
+" tabs
+setlocal tabstop=2
+setlocal shiftwidth=2
+
+" use space instead of tabs
+setlocal expandtab
+
+"set highlight
+

after/ftplugin/ruby/utils.vim

@@ -0,0 +1,24 @@
+" from https://github.com/vim-ruby/vim-ruby/wiki/VimRubySupport
+
+if !exists( "*RubyEndToken" )
+
+  function RubyEndToken()
+    let current_line = getline( '.' )
+    let braces_at_end = '{\s*\(|\(,\|\s\|\w\)*|\s*\)\?$'
+    let stuff_without_do = '^\s*\(class\|if\|unless\|begin\|case\|for\|module\|while\|until\|def\)'
+      let with_do = 'do\s*\(|\(,\|\s\|\w\)*|\s*\)\?$'
+
+      if match(current_line, braces_at_end) >= 0
+        return "\<CR>}\<C-O>O"
+      elseif match(current_line, stuff_without_do) >= 0
+        return "\<CR>end\<C-O>O"
+      elseif match(current_line, with_do) >= 0
+        return "\<CR>end\<C-O>O"
+      else
+        return "\<CR>"
+      endif
+    endfunction
+
+endif
+
+imap <buffer> <CR> <C-R>=RubyEndToken()<CR>