vim 设置标识符(变量，函数)的显示，不加粗。

vim中可以对标识符的显示，进行设置。标识符同行是变量或者函数的名字，在写代码的时候，对标识符的颜色或者是加粗进行设置，会看上去很醒目。不过有些时候，加粗会导致，字符显示的不完整。这做个设置，让标识符，显示成红色，同时不加粗。

vim 中设置标识符设置成红色不加粗

hi Identifier ctermfg=red cterm=none

12. Highlight command                   :highlight :hi E28 E411 E415

There are three types of highlight groups:
- The ones used for specific languages.  For these the name starts with the
  name of the language.  Many of these don't have any attributes, but are
  linked to a group of the second type.
- The ones used for all syntax languages.
- The ones used for the 'highlight' option.
                                                        hitest.vim
You can see all the groups currently active with this command:
    :so $VIMRUNTIME/syntax/hitest.vim
This will open a new window containing all highlight group names, displayed
in their own color.

                                                :colo :colorscheme E185
:colo[rscheme]          Output the name of the currently active color scheme.
...