If you received a text from an unknown number saying, “sup you comnig to this thing?”, would you respond? Michael Cera imagines the ensuing conversation in his epistolary humor piece, “My Man Jeremy,” for The New Yorker. Depending on how you feel about the actor, the piece is either endearingly awkward or annoying, but it’s very Cera — complete with anxiety and references to how he always gets mixed up with fellow “Shouts & Murmurs” contributor Jesse Eisenberg.