commandline tools dealing with missing trailing newline

diff.diff

# diff -c 1.txt 3.txt - lack of newline is announced in output
*** 1.txt	2012-11-03 23:24:05.000000000 -0400
--- 3.txt	2012-11-03 23:28:44.000000000 -0400
***************
*** 1,2 ****
! foo
  bar
\ No newline at end of file
--- 1,2 ----
! food
  bar
\ No newline at end of file

shell.txt

# bash - prompt is tacked onto output
➔ cat 1.txt
foo
bar➔ 

# zsh - lack of newline is shown with "%"
➔ cat 1.txt
foo
bar%
➔