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Update data-munging.md

David Stark committed 2021-07-20 12:26:44 +0100 commit ca4e9c2e3fd4a7285b607d0a5674fdfbf364b793

				compute/data-munging.md
			
          @@ -4,7 +4,7 @@

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

           ### Remove all but one trailing newlines

          -`sed -e :a -e '/^\n*$/{$d;N;};/\n$/ba' file`

          +`sed -i -e :a -e '/^\n*$/{$d;N;};/\n$/ba' file`

           ### Make sure a file has a trailing newline

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

...	...	@@ -4,7 +4,7 @@
4	4	`cat list \| paste -s -d+ \| bc`
5	5
6	6	### Remove all but one trailing newlines
7		-`sed -e :a -e '/^\n*$/{$d;N;};/\n$/ba' file`
	7	+`sed -i -e :a -e '/^\n*$/{$d;N;};/\n$/ba' file`
8	8
9	9	### Make sure a file has a trailing newline
10	10	`tail -c1 file \| read -r _ \|\| echo >> file`