[Webkit-unassigned] [Bug 205196] New: Prefix CSS selectors with all applicable CSS groupings when generating a ChangeLog

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=205196

            Bug ID: 205196
           Summary: Prefix CSS selectors with all applicable CSS groupings
                    when generating a ChangeLog
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: drousso at apple.com

When modifying a style inside a @media grouping, `prepare-ChangeLog` currently adds the media query as a separate line instead of prefixing the modified rule's selector.

e.g., modifying
```
    @media (prefers-color-scheme: dark) {
        body {
            ...
        }
        div {
            ...
        }
    }
```
would generate
```
    (@media (prefers-color-scheme: dark)):
    (body):
    (div):
```
instead of
```
    (@media (prefers-color-scheme: dark) body):
    (@media (prefers-color-scheme: dark) div):
```

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