No longer treat spaces as a valid character in URLs

Example where this is problematic (NSFW):
https://pixwhile.zangetsu.kaizoku.cyou/artworks/107464328

blankie/murl.cpp

@@ -8,8 +8,7 @@
 
 #define UNRESERVED "[\\w\\d\\-._~]"
 #define PCT_ENCODED "%[\\da-f]{2}"
-// A space is added to sub-delims to make it work with URLs that have a space
-#define SUB_DELIMS "[!$&'()*+,;= ]"
+#define SUB_DELIMS "[!$&'()*+,;=]"
 
 #define USERINFO "((?:" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS "|:)*)"
 // A lot looser than RFC 3986, but things will go very wrong very quickly if I comply