fix merge bug inherited from OpenRCS, affecting lines with leading .
diff --git a/lib/diff3.c b/lib/diff3.c
index a04f390..f9a22b0 100644
--- a/lib/diff3.c
+++ b/lib/diff3.c
@@ -541,7 +541,7 @@ ed_patch_lines(struct rcs_lines *dlines, struct rcs_lines *plines)
if (lp == NULL)
return -1;
- if (!memcmp(lp->l_line, ".", 1))
+ if (lp->l_len == 2 && lp->l_line[0] == '.')
break;
TAILQ_REMOVE(&(plines->l_lines), lp, l_list);