patch 8.2.2216: Vim9: range with missing colon can be hard to spot

Problem:    Vim9: range with missing colon can be hard to spot.
Solution:   Include the start of the range in the error. (closes #7543)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 3bb3d49..69e3f12 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -1839,7 +1839,7 @@
 	    // message.
 	    if (ar > ea.cmd)
 	    {
-		emsg(_(e_colon_required_before_a_range));
+		semsg(_(e_colon_required_before_range_str), ea.cmd);
 		goto doend;
 	    }
 	}