My Vim usage notes

vim configuration section

---

• vim tab is set to 4 spaces
  set ts=4 (Note: ts is the abbreviation of tabstop)
  set expandtab
• tab->空格
  :set ts=4
  :set expandtab
  :%retab!
• Space- >tab
  :set ts=4
  :set noexpandtab
  :%retab!
  Add ! is used to process the TAB after non-blank characters, that is, all TABs. If ! is not added, only the TAB at the beginning of the line is processed.