Seems to me this film was a bit ahead of its time (admirably so).
It presented a divorced woman in a sympathetic light at a time when there was still considerable stigma attached to divorce, and treated a working woman matter-of-factly. Doris is given a considerable amount of respect by her co-workers and colleagues, and not one of her male co-workers seemed to bristle at the idea of working with a woman. Plus, there's no hint at the end that she'll give up her job when she marries Fred--just commute. (Probably sharing the ride with her new hubby.)
It's just that I - like everyone - have seen this movie a billion times and I never, ever picked up on this. I wonder if everyone in 1947 made the exact same assumption about the War that I did. How many people missed this back then? How many people still haven't gotten this now?
I want the doctor to take your picture so I can look at you from inside as well.
Uhh, Susan explicitly tells Kris that her mother and father were divorced around the time she was born and that she never met her father--no assumptions needed. Anyone who watched the movie would learn that Doris was a divorced woman--the script says so!
Interesting note in the Trivia - I'm guessing people would have been made aware of it in 1947 it's just us later television viewers who assume the husband didn't come back from the war.