Highlights:

• Bug fixes
  • Fix CFG aliasing error with matrix of matrix (#8445) (by Zhanlue Yang)
• Documentation
  • Update offset.md (#8470) (by Kenshi Takayama)
  • Update math_module.md (#8471) (by Kenshi Takayama)
  • Update accelerate_pytorch.md | Fix typo in recap: Eeasy -> Easy (#8475) (by Aryan Garg)
• Miscellaneous
  • Bump version to 1.7.1 (by Haidong Lan)
  • Bump taichi version to v1.8.0 (#8458) (by Zhanlue Yang)

Full changelog:

• [Misc] Bump version to 1.7.1 (by Haidong Lan)
• [bug] Fix abs on unsigned types (#8476) (by Lin Jiang)
• [Doc] Update offset.md (#8470) (by Kenshi Takayama)
• [Doc] Update math_module.md (#8471) (by Kenshi Takayama)
• [Doc] Update accelerate_pytorch.md | Fix typo in recap: Eeasy -> Easy (#8475) (by Aryan Garg)
• [Misc] Bump taichi version to v1.8.0 (#8458) (by Zhanlue Yang)
• [lang] Warn about non-contiguous gradient tensors (#8450) (by Bob Cao)
• [autodiff] Fix the type of cmp statements in autodiff (#8452) (by Lin Jiang)
• [Bug] Fix CFG aliasing error with matrix of matrix (#8445) (by Zhanlue Yang)
• [misc] Add flag to disable taichi header print (#8413) (by Chaoming Wang)