[bug-diffutils] bug#39910: Add color to "No newline at end of file"

[Cameron Steffen]

Hello,

I think it would be an improvement to add color to the line "\ No
newline at end of file" to represent when a newline character at the
end is added or removed.

For example,

  1. diff --color <(printf "foo") <(printf "bar")
  2. diff --color <(printf "foo") <(printf "bar\n")
  3. diff --color <(printf "foo\n") <(printf "bar")

Expected behavior:

  1. "No newline..." is not colored, no change
  2. "No newline..." from FILE1 is red
  3. "No newline..." from FILE2 is green

Thanks,
Cameron Steffen