patch 9.0.1510: misleading variable name for error message

Problem:    Misleading variable name for error message.
Solution:   Change "name" to "number".  (closes #12345)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 900a0c1..a0a7183 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -6150,7 +6150,8 @@
 		    tab_number = tabpage_index(lastused_tabpage);
 		else
 		{
-		    eap->errmsg = ex_errmsg(e_invalid_value_for_argument_str, eap->arg);
+		    eap->errmsg = ex_errmsg(e_invalid_value_for_argument_str,
+								     eap->arg);
 		    tab_number = 0;
 		    goto theend;
 		}
@@ -9380,7 +9381,7 @@
 	case SPEC_ABUF:		// buffer number for autocommand
 		if (autocmd_bufnr <= 0)
 		{
-		    *errormsg = _(e_no_autocommand_buffer_name_to_substitute_for_abuf);
+		    *errormsg = _(e_no_autocommand_buffer_number_to_substitute_for_abuf);
 		    return NULL;
 		}
 		sprintf((char *)strbuf, "%d", autocmd_bufnr);