> This should be "This should be 'You're thinking'." don't you think?

Reflexively, I think it should be more like ...

  javascript: `This should be "You're thinking".` ; 
  // to preserve the original character use and to avoid '...'...' parse foos
  // however `"...".` also possibly deserves a [sic] to critique the original 
  // i.e. ~grammar police say the period belongs within the quote marks, no?

... but then that's just me, in [my] quirks mode.