git-whatchanged: make default output format be pretty.

If you want the raw stuff, just do

	git-whatchanged --pretty=raw

and it wil act like it used to.

git-whatchanged

 #!/bin/sh
-git-rev-list HEAD | git-diff-tree --stdin -v -r "$@" | LESS="$LESS -S" ${PAGER:-less}
+git-rev-list HEAD | git-diff-tree --stdin --pretty -r "$@" | LESS="$LESS -S" ${PAGER:-less}