Why does SQL developer suggest a different format for a procedure that works

This is my original procedure that works beautifully:

create or replace PROCEDURE EXTRACT_0_CPP AS
    CURSOR c_data IS
        SELECT cpp,
               rfu1,
               rfu2,
               mean_rfu,
               charge_ph7_4,
               hydropathy
        FROM   cpp
        ORDER BY LENGTH(cpp);
    F1 UTL_FILE.FILE_TYPE;

BEGIN 
    F1 := UTL_FILE.FOPEN( location => 'EXTRACT_DIR',
                          filename => '0_cpp.TXT',
                          open_mode => 'w',
                          max_linesize => 32767);
    FOR cur_rec IN c_data LOOP 
        UTL_FILE.PUT_LINE (F1, 
                            cur_rec.cpp || ':' ||
                            cur_rec.rfu1 || ':' ||
                            cur_rec.rfu2 || ':' ||
                            cur_rec.mean_rfu || ':' ||
                            cur_rec.charge_ph7_4 || ':' ||
                            cur_rec.hydropathy);                     
    END LOOP;
    UTL_FILE.FCLOSE(F1);
END;

But SQL Developer gives me a squiggly red line under SELECT and suggests I change it to this:

create or replace PROCEDURE EXTRACT_0_CPP AS
    CURSOR c_data IS
        SELECT
    "A1"."CPP"         "CPP",
    "A1"."RFU1"           "RFU1",
    "A1"."RFU2"           "RFU2",
    "A1"."MEAN_RFU"       "MEAN_RFU",
    "A1"."CHARGE_PH7_4"   "CHARGE_PH7_4",
    "A1"."HYDROPATHY"     "HYDROPATHY"
FROM
    "C##ELLIE"."CPP" "A1"
ORDER BY
    length("A1"."CPP");
    F1 UTL_FILE.FILE_TYPE;

BEGIN 
    F1 := UTL_FILE.FOPEN( location => 'EXTRACT_DIR',
                          filename => '0_cpp.TXT',
                          open_mode => 'w',
                          max_linesize => 32767);
    FOR cur_rec IN c_data LOOP 
        UTL_FILE.PUT_LINE (F1, 
                            cur_rec.pk_cpp || ':' ||
                            cur_rec.rfu1 || ':' ||
                            cur_rec.rfu2 || ':' ||
                            cur_rec.mean_rfu || ':' ||
                            cur_rec.charge_ph7_4 || ':' ||
                            cur_rec.hydropathy);                     
    END LOOP;
    UTL_FILE.FCLOSE(F1);
END;

My question is (why) is this better? What is "A1"?