fix some missed changes in print stylesheet

static/css/print.css

 @import "sh_bright.min.css";
 
-.wrap {
-    display: none;
-}
-
-.github-fork-ribbon-wrapper {
-    display: none;
-}
-
-#nav {
+#wrap, .github-fork-ribbon-wrapper, #nav {
     display: none;
 }
 
     border-radius: 10px;
 }
 
-.show-comments {
-    display: none;
-}
-
 #footer {
     color: gray;
     text-align: center;