vim贪婪匹配与非贪婪匹配

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贪婪匹配模式会尽可能多的匹配结果，非贪婪模式则相反，尽可能少的去匹配。

以下这些为贪婪匹配,参见:help /\{

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\\{n,m} Matches n to m of the preceding atom, as many as possible
\\{n} Matches n of the preceding atom
\\{n,} Matches at least n of the preceding atom, as many as possible 
\\{,m} Matches 0 to m of the preceding atom, as many as possible
\\{} Matches 0 or more of the preceding atom, as many as possible (like *)

以下这些为非贪婪匹配,参见:hep /\{-

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\\{-n,m} matches n to m of the preceding atom, as few as possible
\\{-n} matches n of the preceding atom 
\\{-n,} matches at least n of the preceding atom, as few as possible
\\{-,m} matches 0 to m of the preceding atom, as few as possible
\\{-} matches 0 or more of the preceding atom, as few as possible

因此*.\{-}可以实现.的非贪婪匹配，.\{-1,}可以实现.+的非贪婪匹配

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