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Functions and macros

• Current buffer
  • (current-buffer)
  • (with-current-buffer BUFFER-OR-NAME &rest BODY)
• Buffer name
  • (buffer-name &optional BUFFER)
  • (buffer-file-name &optional BUFFER)
• Buffer content
  • (buffer-string)
  • (buffer-substring START END)
  • (buffer-substring-no-properties START END)