Also list <form> in error message as possible culprit

[eins78]

very small change, but once you start listing things that can't be nested <form> should be among them ;)

[zpao]

I like this, but please run the test before committing, this is failing (we check the error message).

https://github.com/facebook/react/blob/master/src/core/__tests__/ReactInstanceHandles-test.js#L141-L154

[sophiebits]

Note that this same error message is hardcoded in another place – can you update both?

[sophiebits]

(nit: do you mind adding a comma after <p>?)

[sophiebits]

one more tiny nit: can you move the space between "parent." and "Try" to the previous line for consistency with the other line breaks?

[eins78]

@spicyj If I move the space, It would go exatly 1 character over the line limit (80chars),
so it would add another line…

Edit: doesn't really matter because the extra comma already means 1 more line is needed.

[eins78]

Thanks for the feedback, it would not have occured to me to run test for a wording change, but of course it makes sense :)
I just fixed the test, but while grepping for "unexpectedly mutated" to find it I also came across another file which has the same error message (but in another context):
src/browser/ui/dom/DOMChildrenOperations.js
Is this duplication wanted? If yes, I should probably update the message there too, right?

[zpao]

Oh yea, I missed that - good find. Let's update both places.

[eins78]

@zpao Cool, I updated it.
Mind that this message seems to be not tested (not sure if this is an issue).

[zpao]

Sorry for the delay! Thanks!