Fix superfluous newline in html formatting

Every page is formatted in a div, and when the div closes it creates a newline in the html rendering.
In order to fix this a newline is now removed whenever the div is closed (if there are any newlines waiting to be rendered).

src/terminal/formatter.zig

@@ -1354,6 +1354,9 @@ pub const PageFormatter = struct {
                     closing.len,
                 );
             }
+            // Closing the div creates a newline in the output
+            // so make sure to create one less newline
+            if (blank_rows >= 1) blank_rows -= 1;
         }
 
         return .{ .rows = blank_rows, .cells = blank_cells };