Drop trailing blanks and check their absence on make check

Does not change external code (tinyxml)
1 job for no-trailing-blanks in 30 minutes and 18 seconds (queued for 3 seconds)
Status Job ID Name Coverage
failed #13913568


Name Stage Failure
test Test There is an unknown failure, please try again
Makefile:459: recipe for target 'check-recursive' failed
make[2]: *** [check-recursive] Error 1
make[2]: Leaving directory '/builds/strk/libgeos/geos-3.7.0dev/_build'
make[1]: *** [check] Error 2
Makefile:752: recipe for target 'check' failed
make[1]: Leaving directory '/builds/strk/libgeos/geos-3.7.0dev/_build'
make: *** [distcheck] Error 1
Makefile:668: recipe for target 'distcheck' failed
ERROR: Job failed: exit code 1