Update the default instructions for "Edit context" code formatting to include brief explanations of changes

Author: robertpiosik

packages/vscode/package.json

@@ -582,9 +582,9 @@
           "scope": "resource",
           "description": "Style of generated code blocks in \"Edit context\" mode.",
           "default": {
-            "whole": "Whenever showing a new or updated file, include the path in a first-line comment of a Markdown Code Block. Print files in full because I have a disability which means I can't type and need to be able to just copy and paste.",
-            "truncated": "Whenever showing a new or updated file, include the path in a first-line comment of a Markdown Code Block. Unchanged parts should be truncated with ellipsis comments, e.g. \"// ...\".",
-            "diff": "Show changes in the Unified Diff format (compatible with git apply)."
+            "whole": "Whenever showing a new or updated file, include a brief explanation of changes and its path. Print files in full because I have a disability which means I can't type and need to be able to just copy and paste.",
+            "truncated": "Whenever showing a new or updated file, include a brief explanation of changes and its path. Unchanged parts should be truncated with ellipsis comments, e.g. \"// ...\".",
+            "diff": "Whenever showing a new or updated file, include a brief explanation of changes. Print files in the Unified Diff format (that's compatible with the git apply command)."
           },
           "properties": {
             "whole": {