[clang] [clang] Add Bytes/Column types to TextDiagnostic (PR #165541)

[via cfe-commits]

================
@@ -319,28 +378,29 @@ struct SourceColumnMap {
 static void selectInterestingSourceRegion(std::string &SourceLine,
                                           std::string &CaretLine,
                                           std::string &FixItInsertionLine,
-                                          unsigned Columns,
+                                          unsigned NonGutterColumns,
----------------
Sirraide wrote:

```suggestion
                                          Columns NonGutterColumns,
```

https://github.com/llvm/llvm-project/pull/165541