squash-commits-for-pr.sh

	$ git init
	
	#
	# Make some tests commits on master
	#
	$ echo one > one.txt
	$ git commit -am one
	$ echo two > two.txt
	$ echo three >> one.txt 
	$ git commit -am twoandthree
	$ echo four > two.txt 
	$ git commit -am "oops 4"
	$ git ll
	
		3290abd oops 4                                                  (2 sec..) <Rob..>
		05f9b46 twoandthree                                             (29 se..) <Rob..>
		94adca5 one                                                     (53 se..) <Rob..>

	#
	# create a new branch starting at base commit
	#	
	$ git checkout -b squash 94adca5
	
		Switched to a new branch 'squash'
		
	$ git ll
	
		94adca5 one                                                     (2 min..) <Rob..>
	
	#
	# merge from master and squash
	#	
	$ git merge --squash master
	
		Updating 94adca5..3290abd
		Fast-forward
		Squash commit -- not updating HEAD
		 one.txt | 1 +
		 two.txt | 1 +
		 2 files changed, 2 insertions(+)
		 create mode 100644 two.txt
	
	#
	# this will leave the squashed changes uncommited	# 
	$ git s
	
		On branch squash
		Changes to be committed:
		        modified:   one.txt
		        new file:   two.txt

	#
	# commit them
	#
	$ git commit -am squashed
	
	$ git ll
	
		87f593d squashed                                                (2 sec..) <Rob..>
		94adca5 one                                                     (3 min..) <Rob..>