See if a topic got split

[f_m_fmbg]

https://forum.snap.berkeley.edu/t/college-admissions/1412
This doesn't makes sense if you don't know what happened before.
It's split from this topic:

Lazy evaluation in Snap!

For repeated evaluation, see the difference between call-by-name and call-by-need. The point of Haskell's monadic IO and referential transparency is that the programmer needs not care about when or how many times something is evaluated when reasoning about the program's effects. The program is literally a pure lambda calculus expression to normalize. Note that the Church-Rosser theorem does not apply to Haskell, as strict versus lazy evaluation does in fact matter when a program may diverge. So…

Could you implement that you see something like

this topic got split from [...]

[bh]

Probably it'd be easier for me to just edit the message on the rare occasions when I split a thread.