duplicated block id: 1
size: 11 cleaned lines of code
in 2 files:
 - src/backward.h (876:889)
 - src/backward.h (1012:1025)

duplicated block id: 2
size: 7 cleaned lines of code
in 2 files:
 - src/backward.h (1133:1140)
 - src/backward.h (3263:3270)

duplicated block id: 3
size: 6 cleaned lines of code
in 2 files:
 - src/backward.h (1551:1557)
 - src/backward.h (2098:2104)