[Misc] Fix SyntaxWarning - invalid escape sequence '\e' (#36020)

Signed-off-by: cjackal <44624812+cjackal@users.noreply.github.com>

vllm/entrypoints/openai/chat_completion/protocol.py

@@ -343,7 +343,7 @@ class ChatCompletionRequest(OpenAIBaseModel):
         "in output tokens. If such repetition is detected, generation will "
         "be ended early. LLMs can sometimes generate repetitive, unhelpful "
         "token patterns, stopping only when they hit the maximum output length "
-        "(e.g. 'abcdabcdabcd...' or '\emoji \emoji \emoji ...'). This feature "
+        "(e.g. 'abcdabcdabcd...' or '\\emoji \\emoji \\emoji ...'). This feature "
         "can detect such behavior and terminate early, saving time and tokens.",
     )
 

vllm/entrypoints/openai/completion/protocol.py

@@ -173,7 +173,7 @@ class CompletionRequest(OpenAIBaseModel):
         "in output tokens. If such repetition is detected, generation will "
         "be ended early. LLMs can sometimes generate repetitive, unhelpful "
         "token patterns, stopping only when they hit the maximum output length "
-        "(e.g. 'abcdabcdabcd...' or '\emoji \emoji \emoji ...'). This feature "
+        "(e.g. 'abcdabcdabcd...' or '\\emoji \\emoji \\emoji ...'). This feature "
         "can detect such behavior and terminate early, saving time and tokens.",
     )