It has nothing to do with the other 'will', but it is related to 'I'm'. Contracted forms are informal. They are used in conversation and informal writing.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
ScullyWhen is it not appropriate to contract "will"?Theoretically, you can always contract will to 'll, but the more contractions you use, the lower the register. (Register goes from high to low -- from very formal to very slang-filled.)