patch 8.2.1496: Vim9: cannot use " #" in a mapping

Problem:    Vim9: cannot use " #" in a mapping.
Solution:   Do not remove a comment with the EX_NOTRLCOM flag. (closes #6746)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 233ac10..854ff4d 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -4604,6 +4604,7 @@
 #ifdef FEAT_EVAL
 		|| (*p == '#'
 		    && in_vim9script()
+		    && !(eap->argt & EX_NOTRLCOM)
 		    && p[1] != '{'
 		    && p > eap->cmd && VIM_ISWHITE(p[-1]))
 #endif