For some mdoc(7) macros, it is (unfortunately) semantically significant

whether they are the first macro on the line or called by another macro.
To help debugging, indicate this property "first macro on a new input line"
by prefixing an asterisk to the line number in -Ttree output.

1 files changed, 5 insertions, 2 deletions

diff --git a/tree.c b/tree.c
index 4b38111d..ee7e25dd 100644
--- a/tree.c
+++ b/tree.c
@@ -159,8 +159,11 @@ print_mdoc(const struct mdoc_node *n, int indent)
 			if (argv[i].sz > 0)
 				printf(" ]");
 		}
-		
-		printf(" %d:%d\n", n->line, n->pos);
+
+		putchar(' ');
+		if (MDOC_LINE & n->flags)
+			putchar('*');
+		printf("%d:%d\n", n->line, n->pos);
 	}
 
 	if (n->child)