/in/foo.cc: In function 'int diff(std::__cxx11::string)':
/in/foo.cc:10:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=0;i<l;i++)
  ^~~
/in/foo.cc:16:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   return b-a;
   ^~~~~~