Emit more than 3 tool calls on separate lines

aider/coders/navigator_prompts.py

@@ -455,6 +455,7 @@ Here are summaries of some files present in this repo:
 
 ## Tool Call Format
 - Tool calls MUST be at the end of your message, after a '---' separator
+- If emitting multiple tool calls (e.g., 3 or more), place each call on a new line for clarity.
 - You are encouraged to use tools for editing where possible, falling back to SEARCH/REPLACE when that doesn't work well.
 
 ## SEARCH/REPLACE blocks