Fix DE-CoT prompt template

evoprompt/evolution/template_de_cot.py

 # adopted from https://github.com/beeevita/EvoPrompt/blob/bf43b0dcc63fb79b7c0007d4693b2c0721e9a1a7/data/template_de.py
 
 DE_COT_PROMPTS = [
-    "Step 1: Identify the main different parts between the Prompt 1 and Prompt 2:\nPrompt 1: {prompt1}\nPrompt 2: {prompt2}",
+    "Step 1: Identify the different parts between the Prompt 1 and Prompt 2:\nPrompt 1: {prompt1}\nPrompt 2: {prompt2}",
     "Step 2: Randomly mutate the different parts",
     "Step 3: Combine the different parts with Prompt 3, selectively replace it with the different parts in Step 2 and generate a new prompt.\nPrompt 3: {prompt3}",
     "Step 4: Cross over the prompt in the Step 3 with the following basic prompt and generate a final prompt bracketed with <prompt> and </prompt>:\nBasic Prompt: {basic_prompt}",