Viper is a Vi emulation package for Emacs. It implements all Vi and Ex commands, occasionally improving on them and adding many new features<sep/>
<sep/>capabilities. The stock Scintilla lexers are character iterators. Scintilla-st lexers are written using the Lua "LPeg"(http://www.inf.puc-rio.br/~roberto/lpeg.html) library and are generally mo