Compare with saved file

This simple function compares the current buffer with the saved file. The function puts the result in a new buffer in the current session. Use the ^ or up commands to return to the buffer.

# Compare the current buffer with the saved file.
# usage: <diff
function+diff {
db0
H-
ebvar+
!true
ebvar-
etmp
r+1
W !diff -s - '_; true
1
}