low_level_api_chat_cpp.py: Fix missing antiprompt output in chat.

Author: Don Mahurin

examples/low_level_api_chat_cpp.py

@@ -409,12 +409,15 @@ def generate(self):
 				# replace end of text token with newline token when in interactive mode
 				if (id == llama_cpp.llama_token_eos() and self.params.interactive and not self.params.instruct):
 					id = self.llama_token_newline[0]
+					self.embd.append(id)
 					if (self.use_antiprompt()):
 						# tokenize and inject first reverse prompt
 						self.embd_inp += self.first_antiprompt[0]
-
-				# add it to the context
-				self.embd.append(id)
+						for id in self.first_antiprompt[0]:
+							self.embd.append(id)
+				else:
+					# add it to the context
+					self.embd.append(id)
 
 				# echo this to console
 				self.output_echo = True