fix tool regex #208
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fix tool regex #208
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Previously the regex
"tool([^( ]*)\\("was in our R code. It matches "if (...) toolSomething(...)" as intended, but it also matched "tools::file_ext(...)", "mstools::toolSomething(...)" (substring "tools::toolSomething(" matched, which does not make sense), or "function_with_tool_anywhere(...)" (substring "tool_anywhere(" matched), frequently leading to false warnings e.g. when calling mstools tool functions via the recommended::. This PR fixes all of these cases.