readme: add code highlighting

README.md

@@ -96,8 +96,10 @@ is set nevertheless because a remote connection could be made.
 There are mappings for jumping forth and back between changed lines (so-called
 hunks). The following example shows the default mappings and how to change them:
 
-    let g:signify_mapping_next_hunk = '<leader>gj'
-    let g:signify_mapping_prev_hunk = '<leader>gk'
+```vim
+let g:signify_mapping_next_hunk = '<leader>gj'
+let g:signify_mapping_prev_hunk = '<leader>gk'
+```
 
 Note: In case you don't know about the mapleader, have a look at `:h mapleader`.
 The default is the '\' button.
@@ -107,20 +109,26 @@ The default is the '\' button.
 Sy shows you signs for changed lines. Moveover, you can enable highlighting of
 the concerned lines:
 
-    let g:signify_mapping_toggle_highlight = '<leader>gh'
+```vim
+let g:signify_mapping_toggle_highlight = '<leader>gh'
+```
 
 You can also change the highlighting classes for these lines. The defaults are:
 
-    let g:signify_line_color_add    = 'DiffAdd'
-    let g:signify_line_color_delete = 'DiffDelete'
-    let g:signify_line_color_change = 'DiffChange'
+```vim
+let g:signify_line_color_add    = 'DiffAdd'
+let g:signify_line_color_delete = 'DiffDelete'
+let g:signify_line_color_change = 'DiffChange'
+```
 
 #### you can toggle the plugin per buffer
 
 In case you want to disable the plugin for the current buffer, you can toggle
 it:
 
-    let g:signify_mapping_toggle = '<leader>gt'
+```vim
+let g:signify_mapping_toggle = '<leader>gt'
+```
 
 #### exception lists for filetypes and filenames
 
@@ -129,8 +137,10 @@ you explicitely have to create exception lists:
 
 Example:
 
-    let g:signify_exceptions_filetype = [ 'vim', 'c' ]
-    let g:signify_exceptions_filename = [ '.vimrc' ]
+```vim
+let g:signify_exceptions_filetype = [ 'vim', 'c' ]
+let g:signify_exceptions_filename = [ '.vimrc' ]
+```
 
 #### good documentation
 
@@ -138,13 +148,13 @@ You should know by now!
 
 ## Installation
 
-I suggest using tpope's plain and awesome pathogen:
+I suggest using tpope's pathogen:
 
 - https://github.com/tpope/vim-pathogen
 
 Afterwards, just clone vim-signify into ~/.vim/bundle/.
 
-## Usage
+## Documentation
 
 `:h signify`
 
@@ -152,45 +162,47 @@ Afterwards, just clone vim-signify into ~/.vim/bundle/.
 
 For more info: `:h signify-options`
 
-    let g:signify_mapping_next_hunk = '<leader>gn'
-    let g:signify_mapping_prev_hunk = '<leader>gp'
+```vim
+let g:signify_mapping_next_hunk = '<leader>gn'
+let g:signify_mapping_prev_hunk = '<leader>gp'
 
-    let g:signify_mapping_toggle_highlight = '<leader>gh'
-    let g:signify_mapping_toggle           = '<leader>gt'
+let g:signify_mapping_toggle_highlight = '<leader>gh'
+let g:signify_mapping_toggle           = '<leader>gt'
 
-    let g:signify_exceptions_filetype = [ 'vim', 'c' ]
-    let g:signify_exceptions_filename = [ '.vimrc' ]
+let g:signify_exceptions_filetype = [ 'vim', 'c' ]
+let g:signify_exceptions_filename = [ '.vimrc' ]
 
-    let g:signify_sign_overwrite = 1
+let g:signify_sign_overwrite = 1
 
-    let g:signify_sign_add               = '+'
-    let g:signify_sign_delete            = '-'
-    let g:signify_sign_change            = '*'
-    let g:signify_sign_delete            = '-'
-    let g:signify_sign_delete_first_line = '‾'
+let g:signify_sign_add               = '+'
+let g:signify_sign_delete            = '-'
+let g:signify_sign_change            = '*'
+let g:signify_sign_delete            = '-'
+let g:signify_sign_delete_first_line = '‾'
 
-    let g:signify_sign_color_guifg_add      = '#00ff00'
-    let g:signify_sign_color_guifg_delete   = '#ff0000'
-    let g:signify_sign_color_guifg_change   = '#ffff00'
-    let g:signify_sign_color_guibg          = '#111111'
+let g:signify_sign_color_guifg_add      = '#00ff00'
+let g:signify_sign_color_guifg_delete   = '#ff0000'
+let g:signify_sign_color_guifg_change   = '#ffff00'
+let g:signify_sign_color_guibg          = '#111111'
 
-    let g:signify_sign_color_ctermfg_add    = 2
-    let g:signify_sign_color_ctermfg_delete = 1
-    let g:signify_sign_color_ctermfg_change = 3
-    let g:signify_sign_color_ctermbg        = 0
+let g:signify_sign_color_ctermfg_add    = 2
+let g:signify_sign_color_ctermfg_delete = 1
+let g:signify_sign_color_ctermfg_change = 3
+let g:signify_sign_color_ctermbg        = 0
 
-    let g:signify_sign_color_group_add    = 'MyAdd'
-    let g:signify_sign_color_group_delete = 'MyDelete'
-    let g:signify_sign_color_group_change = 'MyChange'
+let g:signify_sign_color_group_add    = 'MyAdd'
+let g:signify_sign_color_group_delete = 'MyDelete'
+let g:signify_sign_color_group_change = 'MyChange'
 
-    let g:signify_line_color_add    = 'DiffAdd'
-    let g:signify_line_color_delete = 'DiffDelete'
-    let g:signify_line_color_change = 'DiffChange'
+let g:signify_line_color_add    = 'DiffAdd'
+let g:signify_line_color_delete = 'DiffDelete'
+let g:signify_line_color_change = 'DiffChange'
 
-    let g:signify_enable_cvs = 1
+let g:signify_enable_cvs = 1
 
-    let g:signify_cursorhold_normal = 1
-    let g:signify_cursorhold_insert = 1
+let g:signify_cursorhold_normal = 1
+let g:signify_cursorhold_insert = 1
+```
 
 ## Author