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0001 * calculate the number of changes files and insertions and deletions between two tags (or branches):
0002 git diff --stat 2.6.0 2.7.0 | tail -n1
0003 
0004 * calculate the number of commits between two tags (or branches):
0005 git log 2.6.0..2.7.0 --oneline --no-merges | wc -l
0006 
0007 * use https://www.timeanddate.com/date/duration.html to calculate the number of dates between the announcements for major releases
0008 
0009 * Results:
0010 
0011 release files_changed insertions deletions commits days
0012 2.1 528 147256 29568 546 644
0013 2.2 188 31427 2599 232 156
0014 2.3 217 19157 6568 310 116
0015 2.4 421 30452 12030 780 260
0016 2.5 875 75135 29508 1807 438
0017 2.6 698 69462 18826 1150 302
0018 2.7 356 168107 9176 476 188
0019 2.8 563 54361 13968 867 328
0020 2.9 1267 110465 53298 1886 594
0021 2.10 1218 908782 61210 1615 322