$ \textbf{hg extdiff -o -NprcC5}
making snapshot of 1 files from rev 
making snapshot of 1 files from working dir
diff -NprcC5 a./myfile a/myfile
*** a./myfile	Sat May 26 18:14:31 2007

***************
*** 1 ****

  The first line.
+ The second line.