- - A header token specified as X-: will match only headers that are exactly
- X-.
- - A header token specified as X- will match all headers that begin with the
- prefix X-, including headers like X-Example, X-Header-Name, etc.
+ - A header token specified as `X-:` will match only headers that are exactly
+ `X-`.
+ - A header token specified as `X-` will match all headers that begin with the
+ prefix `X-`, including headers like `X-Example`, `X-Header-Name`, etc.