Added proof of constructive excluded middle from get_proof
Added proof of constructive excluded middle from get_proof

YaccConstructor/FStar,FStarLang/FStar,MallabaevAzamat/FStar,YaccConstructor/FStar,A-Manning/FStar,hoheinzollern/FStar,hoheinzollern/FStar,MallabaevAzamat/FStar,MallabaevAzamat/FStar,YaccConstructor/FStar,hoheinzollern/FStar,MallabaevAzamat/FStar,FStarLang/FStar,A-Manning/FStar,YaccConstructor/FStar,A-Manning/FStar,FStarLang/FStar,hoheinzollern/FStar