EditOperation
https://github.com/microsoft/vscode/blob/1.88.0/src/vs/editor/common/core/editOperation.ts#L29
public（いずれもstatic）
insert
delete
replace
replaceMove
ISingleEditOperation
https://github.com/microsoft/vscode/blob/1.88.0/src/vs/editor/common/core/editOperation.ts#L13
A single edit operation, that acts as a simple replace.
IMO：編集距離の考え方っぽいかも