removed scroll bar for PDF viewers

When we are on PDF version of this book we don't have the horizontal scroll bars so added newline character so half text doesn't go missing

en/03.1.md

@@ -28,7 +28,9 @@ The full name of a URL is Uniform Resource Locator. It's for describing resource
 	scheme://host[:port#]/path/.../[?query-string][#anchor]
 	scheme         assign underlying protocol (such as HTTP, HTTPS, FTP)
 	host           IP or domain name of HTTP server
-	port#          default port is 80, and it can be omitted in this case. If you want to use other ports, you must specify which port. For example, http://www.cnblogs.com:8080/
+	port#          default port is 80, and it can be omitted in this case. 
+			If you want to use other ports, you must specify which port. For example,
+			http://www.cnblogs.com:8080/
 	path           resources path
 	query-string   data are sent to server
 	anchor         anchor