chore: moves RFC references outside of ABNF block for path templates

Signed-off-by: Vincent Biret <[email protected]>

src/oas.md

@@ -47,14 +47,12 @@ The value for these path parameters MUST NOT contain any unescaped "generic synt
 The path templating is defined by the following [ABNF](https://tools.ietf.org/html/rfc5234) syntax
 
 ```abnf
-; OpenAPI Path Templating ABNF syntax
 path-template                  = "/" *( path-segment "/" ) [ path-segment ]
 path-segment                   = 1*( path-literal / template-expression )
 path-literal                   = 1*pchar
 template-expression            = "{" template-expression-param-name "}"
 template-expression-param-name = 1*( %x00-79 / %x7C / %x7E-10FFFF ) ; every UTF8 character except { and }
 
-; Characters definitions (from RFC 3986)
 pchar               = unreserved / pct-encoded / sub-delims / ":" / "@"
 unreserved          = ALPHA / DIGIT / "-" / "." / "_" / "~"
 pct-encoded         = "%" HEXDIG HEXDIG
@@ -65,6 +63,8 @@ DIGIT               = %x30-39             ; 0-9
 HEXDIG              = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
 ```
 
+Here, all characters definitions are taken from [RFC 3986](https://tools.ietf.org/html/rfc3986). The path-template is directly derived from [RFC 3986, section 3.3](https://datatracker.ietf.org/doc/html/rfc3986#section-3.3).
+
 ### Media Types
 
 Media type definitions are spread across several resources.