Add missing nbsp; code

Author: adamchainz

README.md

@@ -233,7 +233,7 @@ There are also surrogate code points, private and unassigned codepoints, and con
 | `''`    | U+FEFF (Byte Order Mark - BOM)           | has the important property of unambiguity on byte reorder. It is also zerowidth, and invisible. In non-complying software (like the PHP interpreter) this leads to all sorts of fun behaviour. |
 | `'￯'`    | '\\uFFEF' Reversed Byte Order Mark (BOM) | does not equate to a legal character, other than the beginning of text.                                                                                                                        |
 | `'​'`    | '\\u200B' zero-width non-break space     | (a character with no appearance and no effect other than preventing the formation of ligatures).                                                                                               |
-| `' '`    | U+00A0 NO-BREAK SPACE                    | force adjacent characters to stick together. Well known as   in HTML.                                                                                                                          |
+| `' '`    | U+00A0 NO-BREAK SPACE                    | force adjacent characters to stick together. Well known as ` `  in HTML.                                                                                                                          |
 | `'­'`    | U+00AD SOFT HYPHEN                       | (in HTML: ­) like ZERO WIDTH SPACE, but show a hyphen if (and only if) a break occurs.                                                                                                         |
 | `'‍'`    | U+200D ZERO WIDTH JOINER                 | force adjacent characters to be joined together (e.g., arabic characters or supported emoji). Can be used this to compose sequentially combined emoji.                                         |
 | `'⁠'`    | U+2060 WORD JOINER                       | the same as U+00A0, but completely invisible. Good for writing @font-face on Twitter.                                                                                                          |