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Update data-munging.md

David Stark committed 2021-07-19 17:48:03 +0100 commit 5c7844da3c6369c64e12a7fa949702f59ebcd64b

				compute/data-munging.md
			
          @@ -3,6 +3,9 @@

           ### Sum a list of numbers

           `cat list | paste -s -d+ | bc`

          +### Make sure a file has a trailing newline

          +`tail -c1 file | read -r _ || echo >> file`

          +

           ### Double-space a file

           `sed -G`

...	...	@@ -3,6 +3,9 @@
3	3	### Sum a list of numbers
4	4	`cat list \| paste -s -d+ \| bc`
5	5
	6	+### Make sure a file has a trailing newline
	7	+`tail -c1 file \| read -r _ \|\| echo >> file`
	8	+
6	9	### Double-space a file
7	10	`sed -G`
8	11