Proofread 6-to-7 change summary

[ccjmne]

Summary of fixes:

# Extraneous "the" -and the the return type +and the return type # "little-used" is the proper adjective -a little used feature +a little-used feature # "into" is the proper preposition -convert any `Observable` in to a `Promise` +convert any `Observable` into a `Promise` # Operators use the code highlight everywhere else -Calling takeLast without +Calling `takeLast` without # "in line with" is the proper locution (in two places) -This puts us in-line with +This puts us in line with # Past participle expected here -handling is use +handling is used # ... and there -information was send +information was sent # Typo: "to" instead of "two" -the equality of to observables +the equality of two observables

[jakovljevic-mladen]

LGTM, thanks for the fix.

[jakovljevic-mladen]

Thanks for the fix. It is cherry-picked to 7.x branch and deployed to the rxjs.dev.