The first number is the number of lines added, the second the number removed, so we code see for example Robin added 40 lines of developer documentation (files like readme, install.* etc)
Contributions by type and developers devel-doc 50 0 JAMES Mason: [10, 0] Robin Sheat: [40, 0] code 108 84 Chris Nighswonger: [31, 13] Chris Cormack: [1, 1] Ian Walls: [5, 10] Magnus Enger: [2, 2] Colin Campbell: [7, 6] Frère Sébastien Marie: [1, 1] Owen Leonard: [1, 1] Marcel de Rooy: [30, 30] Dobrica Pavlinusic: [1, 1] Janusz Kaczmarek: [1, 1] Katrin Fischer: [7, 6] conan (aka Fernando L. Canizo): [4, 2] Jesse Weaver: [13, 10] Paul Poulain: [4, 0] unknown 14 3 Nicole C. Engard: [1, 1] Liz Rea: [3, 0] Robin Sheat: [10, 2] image 0 0 Owen Leonard: [0, 0] documentation 270 0 Chris Nighswonger: [193, 0] Chris Cormack: [1, 0] Owen Leonard: [17, 0] Robin Sheat: [59, 0] build 38 10 Owen Leonard: [2, 2] Katrin Fischer: [2, 2] Robin Sheat: [34, 6] template 140 94 Chris Cormack: [1, 0] Ian Walls: [3, 3] Liz Rea: [8, 0] Owen Leonard: [89, 70] Katrin Fischer: [22, 21] Paul Poulain: [17, 0]