issue #6737 */ inside code block

The warning regarding the nested comment block was already removed, though the `*` in the second and further lines in the block remained (also the one in front of the `end` command was still present
small example:
```
 * @code
 * root_group->remove("*/stepper_motor/*");
 * root_group->remove("*/stepper_motor/*");
 * @Endcode
```

- removed the `*`
- reset the block name when reaching the `end` command.

Author: albert-github

src/scanner.l

@@ -4751,13 +4751,15 @@ NONLopt [^\n]*
                                           yyextra->fullArgString+=yytext;
                                           if (&yytext[4]==yyextra->docBlockName)
                                           {
+                                            yyextra->docBlockName="";
                                             BEGIN(CopyArgCommentLine);
                                           }
                                         }
 <CopyArgVerbatim>[\\@]("f$"|"f]"|"f}"|"f)") { // end of verbatim block
                                           yyextra->fullArgString+=yytext;
 					  if (yyextra->docBlockName==&yytext[1])
                                           {
+                                            yyextra->docBlockName="";
                                             BEGIN(CopyArgCommentLine);
                                           }
                                         }
@@ -6860,27 +6862,31 @@ NONLopt [^\n]*
                                           yyextra->docBlock << yytext;
                                           if (yyextra->docBlockName=="<pre>")
                                           {
+                                            yyextra->docBlockName="";
                                             BEGIN(DocBlock);
                                           }
                                         }
 <DocCopyBlock>"</"{CODE}">"             { // end of a <code> block
                                           yyextra->docBlock << yytext;
                                           if (yyextra->docBlockName=="<code>")
                                           {
+                                            yyextra->docBlockName="";
                                             BEGIN(DocBlock);
                                           }
                                         }
 <DocCopyBlock>[\\@]("f$"|"f]"|"f}"|"f)")     {
                                           yyextra->docBlock << yytext;
                                           if (yyextra->docBlockName==&yytext[1])
                                           {
+                                            yyextra->docBlockName="";
                                             BEGIN(DocBlock);
                                           }
                                         }
 <DocCopyBlock>[\\@]("endverbatim"|"endiliteral"|"endlatexonly"|"endhtmlonly"|"endxmlonly"|"enddocbookonly"|"endmanonly"|"endrtfonly"|"enddot"|"endmsc"|"enduml"|"endcode")/[^a-z_A-Z0-9] { // end of verbatim block
                                           yyextra->docBlock << yytext;
                                           if (&yytext[4]==yyextra->docBlockName)
                                           {
+                                            yyextra->docBlockName="";
                                             BEGIN(DocBlock);
                                           }
                                         }
@@ -6959,14 +6965,17 @@ NONLopt [^\n]*
 <DocCopyBlock>[^\<@/\*\]~\$\\\n]+       { // any character that is not special
                                           yyextra->docBlock << yytext;
                                         }
-<DocCopyBlock>{CCS}|{CCE}|{CPPC}           {
-                                          if (yytext[1]=='*')
+<DocCopyBlock>{CCS}|{CCE}|{CPPC}        {
+                                          if (!((yyextra->docBlockName=="code") || (yyextra->docBlockName=="iliteral")))
                                           {
-                                            yyextra->nestedComment=TRUE;
-                                          }
-                                          else if (yytext[0]=='*')
-                                          {
-                                            yyextra->nestedComment=FALSE;
+                                            if (yytext[1]=='*')
+                                            {
+                                              yyextra->nestedComment=true;
+                                            }
+                                            else if (yytext[0]=='*')
+                                            {
+                                              yyextra->nestedComment=false;
+                                            }
                                           }
                                           yyextra->docBlock << yytext;
                                         }