Variable: file-name-version-regexp
file-name-version-regexp is a variable defined in files.el.gz.
Value
"\\(?:~\\|\\.~[-[:alnum:]:#@^._]+\\(?:~[[:digit:]]+\\)?~\\)"
Documentation
Regular expression matching the backup/version part of a file name.
Used by file-name-sans-versions.
Source Code
;; Defined in /usr/src/emacs/lisp/files.el.gz
(defvar file-name-version-regexp
"\\(?:~\\|\\.~[-[:alnum:]:#@^._]+\\(?:~[[:digit:]]+\\)?~\\)"
;; The last ~[[:digit]]+ matches relative versions in git,
;; e.g. `foo.js.~HEAD~1~'.
"Regular expression matching the backup/version part of a file name.
Used by `file-name-sans-versions'.")