t / t4135 / diff-with quote.diffon commit t4006-diff-mode.sh: use the $( ... ) construct for command substitution (e1d6b55)
   1--- "postimage".txt.orig        2010-08-18 20:13:31.744002255 -0500
   2+++ "postimage".txt     2010-08-18 20:13:31.744002255 -0500
   3@@ -1 +1 @@
   4-preimage
   5+postimage