@item C-c C-u
Convert the entire buffer to unified format
(@code{diff-context->unified}). With a prefix argument, convert
-unified format to context format. In Transient Mark mode, when the
-mark is active, this command operates only on the region.
+unified format to context format. When the mark is active, convert
+only the text within the region.
@item C-c C-w
Refine the current hunk so that it disregards changes in whitespace
@findex insert-file
@kbd{M-x insert-file} (also @kbd{C-x i}) inserts a copy of the
contents of the specified file into the current buffer at point,
-leaving point unchanged before the contents and the mark after them.
+leaving point unchanged before the contents. The position after the
+inserted contents is added to the mark ring, without activating the
+mark (@pxref{Mark Ring}).
@findex insert-file-literally
@kbd{M-x insert-file-literally} is like @kbd{M-x insert-file},