[clang-tools-extra] [clang-tidy] Enhance modernize-use-starts-ends-with to handle substr patterns (PR #116033)

[Nicolas van Kempen via cfe-commits]

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@@ -59,6 +59,7 @@ struct basic_string {
   _Type& insert(size_type pos, const _Type& str);
   _Type& insert(size_type pos, const C* s);
   _Type& insert(size_type pos, const C* s, size_type n);
+  _Type substr(size_type pos = 0, size_type count = npos) const;
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nicovank wrote:

```suggestion

  _Type substr(size_type pos = 0, size_type count = npos) const;
```

Just to separate it from the `insert` methods.

https://github.com/llvm/llvm-project/pull/116033