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doc: update docs/lua.md (#661)

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* Update lua.md

* Update lua.md

* Update lua.md
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leauny 2024-06-09 01:42:21 +08:00 committed by GitHub
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commit df9c2ac08b
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1 changed files with 2 additions and 2 deletions
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@ -549,8 +549,8 @@ string.lower("STR") -- str
-- 指定替换的字符串个数, 最后一个参数可选，默认是全部替换
string.gsub("aaaa", "a", "b", 3) -- bbba 3
string.gsub("Today is 29/01/2019", "%d%d/%d%d/%d%d%d%d", "good day.")
-- Today is a good day. 1
string.gsub("Today is 29/01/2019", "%d%d/%d%d/%d%d%d%d", "a good day.")
-- Today is a good day.
-- 查找第一个匹配的字符串，第三个参数可以提供开始查找的位置，默认从 1 开始
-- 如果未找到，则返回 nil