[analysis_server] Fix some issues with requests made at an offset between name and type/parameter lists Removal AstNodes for names in declarations left some of these places getting FormalParameterList/TypeParameterLists when an offset was between the name and parameter list. This is a fairly common case if you double-click to select a name in VS Code (it sends the end of the name as the offset). This only changes the case where a single offset is provided (not a range), and it is both the start of the parameter list and the end of the name. Fixes https://github.com/Dart-Code/Dart-Code/issues/4157. Change-Id: I1219fa70b0795b61c60f31ad61ff9a34954c8b43 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/260381 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
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