Incorrect handling command character in comment conversion

In case we have a construct like `///@` that should be handled by commentcnv this was not done correctly as the command character was taken a bit early.

Author: albert-github

src/commentcnv.l

@@ -175,6 +175,7 @@ MAILADDR   ("mailto:")?[a-z_A-Z0-9\x80-\xff.+-]+"@"[a-z_A-Z0-9\x80-\xff-]+("."[a
 %x SnippetDoc
 %x IncludeFile
 
+CMD ("\\"|"@")
   //- start: NUMBER -------------------------------------------------------------------------
   // Note same defines in code.l: keep in sync
 DECIMAL_INTEGER  [1-9][0-9']*[0-9]?[uU]?[lL]?[lL]?
@@ -953,7 +954,7 @@ SLASHopt [/]*
 				     yyextra->inRoseComment=false;
 				     BEGIN(Scan);
                                    }
-<SComment>\n[ \t]*{CPPC}"/"[^\/\n]/.*\n  {
+<SComment>\n[ \t]*{CPPC}"/"[^\\@\/\n]/.*\n  {
                                      replaceComment(yyscanner,1);
 				     yyextra->readLineCtx=YY_START;
 				     BEGIN(ReadLine);
@@ -1241,6 +1242,7 @@ SLASHopt [/]*
 <ReadLine>`[^`]+`                  {
   				     copyToOutput(yyscanner,yytext,yyleng);
                                    }
+<ReadLine>{CMD}{CMD}               |
 <ReadLine>.			   {
   				     copyToOutput(yyscanner,yytext,yyleng);
   				   }