// note misleading alignment
if ( a )
   if ( b ) x=y;
else x=z;

// the proper alignment is
if ( a )
   if ( b ) x=y;
   else x=z;

// if the two examples look the same, please notify me.
// Sometimes I inadvertently fix the misaligned example
// with a bulk tidy.
// The top one should look like this:
// if ( a )
//   if ( b ) x=y;
// else x=z;