Zero Width Space
A vere useful where text needs to be wrapped and regular spaces cannot be used. The unicode for it is 0x200B, in linux it can be inserted by typing Ctrl+Shift+U with unicode characher code following right after that
Thisisatestparagraphwhereunicodecharacterthatisinvisiblespaceotherwisecalledzerowidthspaceisused.Itwrapsaroundtheedgesofthescreenand/orparentelementandisveryusefulinotherplaces.Textjustnicelywrapsaroundsuchplaceevenifitlooksweirdotherwise.Iuseditinmyblogsettingssomysociallinkswouldwraparoundnicelywhereneeded.Unicodeisaveryusefulindeed.
Having a nbsp (0x00A0) in tags also returns weird results in when browsing and/or reading posts. It also can't be copy-pasted. It must be typed manually by using keyboard shortcut and hex code right after that.