[analysis server] Fix links in implementation docs

Change-Id: Ie40111a6bfed4a6f088f1e7bd3f365aa060a1b0c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/393700
Reviewed-by: Samuel Rawlins <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>
Commit-Queue: Samuel Rawlins <[email protected]>

Author: parlough

pkg/analysis_server/doc/implementation/code_edits.md

@@ -10,11 +10,11 @@ distinguish between three kinds of code editing features:
 
 - a [quick assist](quick_assist.md) is a code edit that is both local in scope
   and doesn't require any user input. They are available when the selection is
-  within the assist's [available range][].
+  within the assist's [available range](#choosing-an-available-range).
 
 - a [refactoring]() is a code edit that is either non-local in scope or that
   requires user input. They are available when the selection is within the
-  assist's [available range][].
+  assist's [available range](#choosing-an-available-range).
 
 ## Scope
 

pkg/analysis_server/doc/implementation/data_driven_fixes.md

@@ -12,7 +12,7 @@ they are a way of allowing a package author to specify API-specific quick fixes.
 
 Before you read this you should be familiar with both
 - [Writing a quick fix](quick_fix.md), and
-- [Data-driven Fixes](https://github.com/flutter/flutter/wiki/Data-driven-Fixes).
+- [Data-driven Fixes](https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md).
 
 ## How data-driven fixes work
 
@@ -78,7 +78,7 @@ you would instead modify something that already exists.
 The first step is to design the changes to the data-file format that will allow
 users to specify the change. Follow the design principles outlined in the
 Overview in
-[Data-driven Fixes](https://github.com/flutter/flutter/wiki/Data-driven-Fixes).
+[Data-driven Fixes](https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md).
 
 In addition, look at the existing changes to ensure that a new kind of change is
 required. It might make more sense to extend an existing change rather than to