Update of ABAP syntax highlighter (#4042)
Update of ABAP syntax highlighter (#4042)

Some clean-up and additions based on https://github.com/microsoft/monaco-languages/pull/112

Co-authored-by: Lars Hvam <721d1b171982cd84b755f6b25130d2b88cd1f696@hotmail.com>
EduardoCopat/abapGit,sbcgua/abapGit,sbcgua/abapGit,larshp/abapGit,EduardoCopat/abapGit,larshp/abapGit