Clarify default instructions for edit context code block formatting settings

Author: robertpiosik

packages/vscode/package.json

@@ -2,7 +2,7 @@
   "name": "gemini-coder",
   "displayName": "Code Web Chat",
   "description": "Superfast AI coding (CWC)",
-  "version": "1.613.0",
+  "version": "1.614.0",
   "scripts": {
     "build": "npx vsce package --no-dependencies",
     "vscode:prepublish": "rimraf out && npm run compile",
@@ -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, print the path and a Markdown Code Block with file's full contents. I have a disability which means I can't type and need to be able to just copy and paste. Briefly explain your reasoning, when you deem appropriate.",
-            "truncated": "Whenever showing a new or updated file, print the path and a Markdown Code Block with truncated contents. To save space, unchanged parts should be replaced by ellipsis comments, e.g. \"// ...\". Briefly explain your reasoning, when you deem appropriate.",
-            "diff": "Whenever showing a new or updated file, use the the Unified Diff format (that's compatible with the git apply command). Each diff should be placed in a Markdown Code Block. Briefly explain your reasoning, when you deem appropriate."
+            "whole": "Whenever showing a new or updated file, print the path and a Markdown Code Block with file's full contents—as I have a disability which means I can't type and need to be able to just copy and paste. Provide brief explanations around code blocks, when you deem appropriate.",
+            "truncated": "Whenever showing a new or updated file, print the path and a Markdown Code Block with truncated file's contents. To save space, unchanged parts should be hidden behind ellipsis comments, e.g. \"// ...\". Provide brief explanations around code blocks, when you deem appropriate.",
+            "diff": "Whenever showing a new or updated file, use the the unified diff (unidiff) format, within a Markdown Code Block. Provide brief explanations around code blocks, when you deem appropriate."
           },
           "properties": {
             "whole": {