Shell Programming and Scripting

#!/usr/bin/env bash

# @(#) s1	Demonstrate word-by-word differences.

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C wdiff

FILES="data*"
pl " Input files data*:"
head $FILES

pl " Word-by-word differences:"
wdiff $FILES

pl " Word-by-word differences, avoid spanning newlines:"
wdiff -n $FILES

exit 0

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
wdiff GNU wdiff 0.5

-----
 Input files data*:
==> data1 <==
aaa bbb ccc
dddd efg hij

==> data2 <==
aaa bcd edgf
xxx yyy kkh

-----
 Word-by-word differences:
aaa [-bbb ccc
dddd efg hij-] {+bcd edgf
xxx yyy kkh+}

-----
 Word-by-word differences, avoid spanning newlines:
aaa [-bbb ccc-]
[-dddd efg hij-] {+bcd edgf+}
{+xxx yyy kkh+}