Fixes #8278: fix on print

dist/css/bootstrap.css

@@ -277,6 +277,13 @@ table {
   .label {
     border: 1px solid #000;
   }
+  .table {
+    border-collapse: collapse !important;
+  }
+  .table-bordered th,
+  .table-bordered td {
+    border: 1px solid #ddd !important;
+  }
 }
 
 * {

less/print.less

@@ -86,4 +86,15 @@
   .label {
     border: 1px solid #000;
   }
+
+  .table {
+    border-collapse: collapse !important;
+  }
+  .table-bordered {
+    th,
+    td {
+      border: 1px solid #ddd !important;
+    }
+  }
+
 }