FP on console output in diff test result file

[CuriousGeorgiy]

Reproducer:

ERROR:TRAILING_WHITESPACE: trailing whitespace
#117: FILE: test/box/tx_man.result:1923:
+ | - $

ERROR:TRAILING_WHITESPACE: trailing whitespace
#125: FILE: test/box/tx_man.result:1931:
+ | - $

ERROR:TRAILING_WHITESPACE: trailing whitespace
#142: FILE: test/box/tx_man.result:1948:
+ | - $

ERROR:TRAILING_WHITESPACE: trailing whitespace
#154: FILE: test/box/tx_man.result:1960:
+ | - $