ediff-save-buffer
ediff-save-buffer is an interactive compiled Lisp function in `ediff-util.el
'.
(ediff-save-buffer ARG)
Safe way of saving buffers A, B, C, and the diff output.
`wa' saves buffer A, `wb' saves buffer B, `wc' saves buffer C,
and `wd' saves the diff output.
With prefix argument, `wd' saves plain diff output.
Without an argument, it saves customized diff argument, if available
(and plain output, if customized output was not generated).