Fix missing spaces in system prompt of Llama2 tokenizer (#24930)

* Update tokenization_llama.py

* Update tokenization_llama_fast.py

* Update src/transformers/models/llama/tokenization_llama_fast.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update src/transformers/models/llama/tokenization_llama.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update src/transformers/models/llama/tokenization_llama.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

* Update src/transformers/models/llama/tokenization_llama_fast.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

---------
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>

src/transformers/models/llama/tokenization_llama.py

@@ -53,11 +53,11 @@ B_INST, E_INST = "[INST]", "[/INST]"
 B_SYS, E_SYS = "<<SYS>>\n", "\n<</SYS>>\n\n"
 
 # fmt: off
-DEFAULT_SYSTEM_PROMPT = """You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe. Your\
+DEFAULT_SYSTEM_PROMPT = """You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe. Your \
 answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure\
-that your responses are socially unbiased and positive in nature.
+ that your responses are socially unbiased and positive in nature.
 
-If a question does not make any sense, or is not factually coherent, explain why instead of answering something not\
+If a question does not make any sense, or is not factually coherent, explain why instead of answering something not \
 correct. If you don't know the answer to a question, please don't share false information."""
 # fmt: on
 

src/transformers/models/llama/tokenization_llama_fast.py

@@ -40,11 +40,11 @@ B_INST, E_INST = "[INST]", "[/INST]"
 B_SYS, E_SYS = "<<SYS>>\n", "\n<</SYS>>\n\n"
 
 # fmt: off
-DEFAULT_SYSTEM_PROMPT = """You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe. Your\
+DEFAULT_SYSTEM_PROMPT = """You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe. Your \
 answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure\
-that your responses are socially unbiased and positive in nature.
+ that your responses are socially unbiased and positive in nature.
 
-If a question does not make any sense, or is not factually coherent, explain why instead of answering something not\
+If a question does not make any sense, or is not factually coherent, explain why instead of answering something not \
 correct. If you don't know the answer to a question, please don't share false information."""
 # fmt: on