Use 'funcvec' as common grammatical production name instead of 'prlist' or 'functuple'

Author: lukewagner

design/mvp/Binary.md

@@ -186,8 +186,8 @@ casetype      ::= 0x00                                 =>
                 | 0x01 t:<valtype>                     => t
 valtype       ::= i:<typeidx>                          => i
                 | pvt:<primvaltype>                    => pvt
-functype      ::= 0x40 p*:<prlist> r*:<prlist>         => (func (param p)* (result r)*)
-prlist        ::= 0x00 t:<valtype>                     => [t]
+functype      ::= 0x40 p*:<funcvec> r*:<funcvec>       => (func (param p)* (result r)*)
+funcvec       ::= 0x00 t:<valtype>                     => [t]
                 | 0x01 nt*:vec(<namedvaltype>)         => nt*
 componenttype ::= 0x41 cd*:vec(<componentdecl>)        => (component cd*)
 instancetype  ::= 0x42 id*:vec(<instancedecl>)         => (instance id*)

design/mvp/WIT.md

@@ -348,10 +348,10 @@ sleep: async func(ms: u64) -> ()
 Specifically functions have the structure:
 
 ```wit
-func-item ::= id ':' 'async'? 'func' func-tuple '->' func-tuple
+func-item ::= id ':' 'async'? 'func' func-vec '->' func-vec
 
-func-tuple ::= ty
-             | '(' func-named-type-list ')'
+func-vec ::= ty
+           | '(' func-named-type-list ')'
 
 func-named-type-list ::= nil
                        | func-named-type ( ',' func-named-type )*