fn_call_converter: Fix newline in in-context learning prompt (#5903)

openhands/llm/fn_call_converter.py

@@ -224,7 +224,7 @@ def index():
 --------------------- END OF NEW TASK DESCRIPTION ---------------------
 
 PLEASE follow the format strictly! PLEASE EMIT ONE AND ONLY ONE FUNCTION CALL PER MESSAGE.
-""".lstrip()
+"""
 
 # Regex patterns for function call parsing
 FN_REGEX_PATTERN = r'<function=([^>]+)>\n(.*?)</function>'