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Is there a way to remove unsaved text and get back the latest saved state of a file in Emacs without using undo?
Like this:
| a - write some text to save
| b - save the file
| c - add some text to remove
| d - more text to remove
| e - command/function to remove all text after b
Use M-x revert-buffer. A buffer only visits a file. The revert-buffer function reloads the current buffer's source file from disk. So long as the file hasn't changed since you last saved it, as might happen if another process writes to it, revert-buffer will restore the buffer to point b, removing all text inserted after b.
As a bonus, you don't need to type the whole thing. Typing M-x rev-b is sufficient.
revert-buffer-region while assigning a key binding for revert-buffer- And I even read the description saying something like "undo selected region in a buffer". Now it just "disappeared".
Jan 30, 2019 at 21:15
undo help: In Transient Mark mode when the mark is active, only undo changes within the current region. Similarly, when not in Transient Mark mode, just C-u as an argument limits undo to changes within the current region. Select a region of text and then do C-u C-/ to undo within the selection. Might that be what you read?
Jan 30, 2019 at 22:10
a-b-c-d-einstead ofa-b-c-d-d?