The documentation for the centerTitle property in AppBarTheme is the main one that I want to fix. Currently, it has the following docs:

/// Overrides the default value for [AppBar.centerTitle].
/// property in all descendant widgets.

And I'm fixing it with the following docs instead:

/// Overrides the default value of [AppBar.centerTitle]
/// property in all descendant [AppBar] widgets.

I'm also thinking to standardise the wording used across all the properties, currently some docs have the following:

/// Overrides the default value for [some_property].
/// property in all descendant widgets.

And I'm proposing with the following docs which align with the rest of the docs in AppBarTheme:

/// Overrides the default value of [some_property]
/// property in all descendant [AppBar] widgets.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

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