Solution : https://service.sap.com/sap/support/notes/891549 (SAP Service marketplace login required)
Key words :
linecomment</verbid> <descr>comment selected lines, lineuncomment</verbid> <descr>uncomment selected lines, terms sapab4edit abap editor ab4 solution, <display> <statusbar>1</statusbar></display>, alt-f12 => options => tab, component bc-fes-ctl, wrong opening select statement, nearest preceding select statement, matching opening select statement, <enter> hotkey inserts codehint
Related Notes :
| 1042863 | Inserting code hints using the ENTER key |
| 930742 | Support for AB4 control in ABAP editor |
| 843289 | ABAP Editor as part of SAP GUI 6.40 |