This is a follow up to a question I asked in the

CodePudding user response：

You can use a function as a replacement argument:

result = string.gsub ( s, '\\sitem%s (.-)(\n\\)' , '\\item\\makefirstuc {%1},%2')

See the online demo.

Details:

• \\sitem - a \sitem fixed string
• %s - one or more whitespaces
• (.-) - Group 1 (%1): any zero or more chars as few as possible
• (\n\\) - Group 2 (%2): a newline and a \.

CodePudding user response：

The . pattern matcher in Lua's patterns matches new lines, so something like this would work:

s = s:gsub(
    "\\item%s (. )",
    function(it)
        return "\\item\\makefirstuc " .. it:gsub("\n", " ")
    end
)