fixed syntax warnings

[KareemMusleh]

I kept getting SyntaxWarnings when importing unsloth from the terminal.

flake8 | grep escape

[danielhanchen]

Oh thanks for this - let me confirm all issues in a new runtime!

[steve2972]

I also keep getting SyntaxWarnings. Hope this PR fixes this!
Weird thing is, I only get these syntax warnings when using cold builds. Every subsequent run doesn't seem to have this problem.

Unsloth: Patching Xformers to fix some performance issues.
🦥 Unsloth: Will patch your computer to enable 2x faster free finetuning.
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/llama.py:1599: SyntaxWarning: invalid escape sequence '\ '
  f"   \\\   /|    GPU: {gpu_stats.name}. Max memory: {max_memory} GB. Platform: {platform_system}.\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/llama.py:1600: SyntaxWarning: invalid escape sequence '\_'
  f"O^O/ \_/ \\    Torch: {torch.__version__}. CUDA: {gpu_stats.major}.{gpu_stats.minor}. CUDA Toolkit: {torch.version.cuda}. Triton: {triton_version}\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/llama.py:1601: SyntaxWarning: invalid escape sequence '\ '
  f"\        /    Bfloat16 = {str(SUPPORTS_BFLOAT16).upper()}. FA [Xformers = {xformers_version}. FA2 = {HAS_FLASH_ATTENTION}]\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/llama.py:1752: SyntaxWarning: invalid escape sequence '\.'
  start = re.search('logger\.info\([\"\'].+?Running training', inner_training_loop).span(0)[0]
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/llama.py:1755: SyntaxWarning: invalid escape sequence '\s'
  spaces = re.search('\n([\s\t]{1,})', original_debug).group(0)[1:]
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/llama.py:1756: SyntaxWarning: invalid escape sequence '\s'
  front_spaces = re.match('([\s\t]{1,})', inner_training_loop).group(0)
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/_utils.py:584: SyntaxWarning: invalid escape sequence '\.'
  source = re.sub("([^\.])nn\.", r"\1torch.nn.", source)
... {Multiple other SyntaxWarnings}
🦥 Unsloth Zoo will now patch everything to make training faster!
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/save.py:481: SyntaxWarning: invalid escape sequence '\s'
  gb_found = re.match("([0-9]{1,})[\s]{0,}GB", max_shard_size, flags = re.IGNORECASE)
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/save.py:482: SyntaxWarning: invalid escape sequence '\s'
  mb_found = re.match("([0-9]{1,})[\s]{0,}MB", max_shard_size, flags = re.IGNORECASE)
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/save.py:1011: SyntaxWarning: invalid escape sequence '\ '
  f"   \\\   /|    [0] Installing llama.cpp might take 3 minutes.\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/save.py:1012: SyntaxWarning: invalid escape sequence '\_'
  f"O^O/ \_/ \\    [1] Converting HF to GGUF 16bits might take 3 minutes.\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/save.py:1013: SyntaxWarning: invalid escape sequence '\ '
  f"\        /    [2] Converting GGUF 16bits to {quantization_method} might take 10 minutes each.\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/vision.py:101: SyntaxWarning: invalid escape sequence '\ '
  f"   \\\   /|    GPU: {gpu_stats.name}. Max memory: {max_memory} GB. Platform: {platform_system}.\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/vision.py:102: SyntaxWarning: invalid escape sequence '\_'
  f"O^O/ \_/ \\    Torch: {torch.__version__}. CUDA: {gpu_stats.major}.{gpu_stats.minor}. CUDA Toolkit: {torch.version.cuda}. Triton: {triton_version}\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/models/vision.py:103: SyntaxWarning: invalid escape sequence '\ '
  f"\        /    Bfloat16 = {str(SUPPORTS_BFLOAT16).upper()}. FA [Xformers = {xformers_version}. FA2 = {HAS_FLASH_ATTENTION}]\n"\
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/chat_templates.py:1683: SyntaxWarning: invalid escape sequence '\{'
  try: found = next(re.finditer("(" + try_find + ").+?\{INPUT\}", chat_template, flags = re.DOTALL | re.MULTILINE))
/home/user/.../.venv/lib/python3.12/site-packages/unsloth/chat_templates.py:2124: SyntaxWarning: invalid escape sequence '\d'
  gguf_tokenized = re.findall("([\d]{1,}) \-\> \'([^\']{1,})\'", gguf_tokens, flags = re.MULTILINE)