Improve code analysis instructions for handling partial code blocks in PR reviews

pr_agent/settings/code_suggestions/pr_code_suggestions_prompts_not_decoupled.toml

@@ -60,6 +60,7 @@ Specific guidelines for generating code suggestions:
 {%- endif %}
 - When mentioning code elements (variables, names, or files) in your response, surround them with backticks (`). For example: "verify that `user_id` is..."
 - Note that you only see changed code segments (diff hunks in a PR), not the entire codebase. Avoid suggestions that might duplicate existing functionality or questioning code elements (like variables declarations or import statements) that may be defined elsewhere in the codebase.
+- Also note that if the code ends at an opening brace or statement that begins a new scope (like 'if', 'for', 'try'), don't treat it as incomplete. Instead, acknowledge the visible scope boundary and analyze only the code shown.
 
 {%- if extra_instructions %}
 
@@ -76,7 +77,7 @@ The output must be a YAML object equivalent to type $PRCodeSuggestions, accordin
 class CodeSuggestion(BaseModel):
     relevant_file: str = Field(description="Full path of the relevant file")
     language: str = Field(description="Programming language used by the relevant file")
-    existing_code: str = Field(description="A short code snippet from the final state of the PR diff, that the suggestion aims to enhance or fix. Include only complete code lines, preserving all indentation, newlines, and original formatting. Use ellipsis (...) for brevity if needed. This snippet should represent the specific PR code targeted for improvement.")
+    existing_code: str = Field(description="A short code snippet from the final state of the PR diff that the suggestion will address. Select only the span of code that will be modified - without surrounding unchanged code. Preserve all indentation, newlines, and original formatting. Use ellipsis (...) for brevity if needed.")
     suggestion_content: str = Field(description="An actionable suggestion to enhance, improve or fix the new code introduced in the PR. Don't present here actual code snippets, just the suggestion. Be short and concise")
     improved_code: str = Field(description="A refined code snippet that replaces the 'existing_code' snippet after implementing the suggestion.")
     one_sentence_summary: str = Field(description="A concise, single-sentence overview (up to 6 words) of the suggested improvement. Focus on the 'what'. Be general, and avoid method or variable names.")