The correct spelling of the phrase "is in to one for" is actually "is into one form." The "m" in "form" has been mistaken for an "r" due to a common handwriting error. The phonetic transcription for this phrase would be /ɪz ˈɪntu ˈwʌn fɔːm/. It is important to pay attention to spelling errors as they can completely change the meaning of a sentence or phrase. Always double-check and proofread to ensure accurate spelling.