ifpps: bad grammar in printf()

I believe "it's good to use a -t of 10sec." is meant. 

Is the branching done correctly? 
  ...
 1917 git checkout -b branch-ifpps.c
 1918  vi ifpps.c 
 1919  git add ifpps.c 
 1920  git commit -m "ifpps: bad grammar in printf()"
 1923  git checkout master
 1924  git merge branch-ifpps.c
 1926  git push