VIM Plugin: Highlight keyword temporarily.
Licensed under the same terms as Vim itself.
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[Default Usage]
Assume <leader> is default value \, use \0 ~ \9 to add keywords to group 0 ~ 9.
\c0 ~ \c9 can clear corresponding groups.
\ca can clear all groups.
[Customization]
Set TempKeywordCmdPrefix to change prefix command. Use DeclareTempKeyword to add more groups with customized color.