[clang-tools-extra] [clang-tidy] support string::contains (PR #110351)

[Nicolas van Kempen via cfe-commits]

================
@@ -30,9 +32,15 @@ void ContainerContainsCheck::registerMatchers(MatchFinder *Finder) {
               ofClass(cxxRecordDecl(HasContainsMatchingParamType)))))
           .bind("call");
 
+  const auto Literal0 = integerLiteral(equals(0));
+  const auto Literal1 = integerLiteral(equals(1));
+
   const auto FindCall =
       cxxMemberCallExpr(
-          argumentCountIs(1),
+          anyOf(argumentCountIs(1),
+                allOf(argumentCountIs(2), // string::find takes two arguments
----------------
nicovank wrote:

```suggestion
                // `find` for string-like classes often has a second parameter,
                // indicating where to start the search. We match if it's
                // the default zero or explicitly equal to zero.
                allOf(argumentCountIs(2),
```

I think a little more detail is good here.

https://github.com/llvm/llvm-project/pull/110351