Revert "Highlight all EBNF snippets. Add missing semicolons."

This reverts commit a60c4e7.

Author: odersky

docs/_docs/reference/changed-features/imports.md

@@ -46,14 +46,14 @@ are offered under settings `-source 3.1-migration -rewrite`.
 
 ### Syntax
 
-```ebnf
-Import            ::=  ‘import’ ImportExpr {‘,’ ImportExpr} ;
-ImportExpr        ::=  SimpleRef {‘.’ id} ‘.’ ImportSpec ;
+```
+Import            ::=  ‘import’ ImportExpr {‘,’ ImportExpr}
+ImportExpr        ::=  SimpleRef {‘.’ id} ‘.’ ImportSpec
 ImportSpec        ::=  NamedSelector
                     |  WildcardSelector
-                    | ‘{’ ImportSelectors) ‘}’ ;
-NamedSelector     ::=  id [‘as’ (id | ‘_’)] ;
-WildCardSelector  ::=  ‘*' | ‘given’ [InfixType] ;
+                    | ‘{’ ImportSelectors) ‘}’
+NamedSelector     ::=  id [‘as’ (id | ‘_’)]
+WildCardSelector  ::=  ‘*' | ‘given’ [InfixType]
 ImportSelectors   ::=  NamedSelector [‘,’ ImportSelectors]
-                    |  WildCardSelector {‘,’ WildCardSelector} ;
+                    |  WildCardSelector {‘,’ WildCardSelector}
 ```

docs/_docs/reference/changed-features/match-syntax.md

@@ -47,10 +47,10 @@ The syntactical precedence of match expressions has been changed.
 
 The new syntax of match expressions is as follows.
 
-```ebnf
+```
 InfixExpr    ::=  ...
-               |  InfixExpr MatchClause ;
+               |  InfixExpr MatchClause
 SimpleExpr   ::=  ...
-               |  SimpleExpr ‘.’ MatchClause ;
-MatchClause  ::=  ‘match’ ‘{’ CaseClauses ‘}’ ;
+               |  SimpleExpr ‘.’ MatchClause
+MatchClause  ::=  ‘match’ ‘{’ CaseClauses ‘}’
 ```

docs/_docs/reference/changed-features/pattern-bindings.md

@@ -50,8 +50,8 @@ for case (x, y) <- elems yield (y, x)  // returns List((2, 1), (4, 3))
 ## Syntax Changes
 
 Generators in for expressions may be prefixed with `case`.
-```ebnf
-Generator      ::=  [‘case’] Pattern1 ‘<-’ Expr ;
+```
+Generator      ::=  [‘case’] Pattern1 ‘<-’ Expr
 ```
 
 ## Migration

docs/_docs/reference/changed-features/structural-types-spec.md

@@ -6,11 +6,11 @@ movedTo: https://docs.scala-lang.org/scala3/reference/changed-features/structura
 
 ## Syntax
 
-```ebnf
-SimpleType    ::= ... | Refinement ;
-Refinement    ::= ‘{’ RefineStatSeq ‘}’ ;
-RefineStatSeq ::=  RefineStat {semi RefineStat} ;
-RefineStat    ::= ‘val’ VarDcl | ‘def’ DefDcl | ‘type’ {nl} TypeDcl ;
+```
+SimpleType    ::= ... | Refinement
+Refinement    ::= ‘{’ RefineStatSeq ‘}’
+RefineStatSeq ::=  RefineStat {semi RefineStat}
+RefineStat    ::= ‘val’ VarDcl | ‘def’ DefDcl | ‘type’ {nl} TypeDcl
 ```
 
 ## Implementation of Structural Types

docs/_docs/reference/changed-features/vararg-splices.md

@@ -24,12 +24,12 @@ The old syntax for splice arguments will be phased out.
 
 ## Syntax
 
-```ebnf
+```
 ArgumentPatterns  ::=  ‘(’ [Patterns] ‘)’
-                    |  ‘(’ [Patterns ‘,’] Pattern2 ‘*’ ‘)’ ;
+                    |  ‘(’ [Patterns ‘,’] Pattern2 ‘*’ ‘)’
 
 ParArgumentExprs  ::=  ‘(’ [‘using’] ExprsInParens ‘)’
-                    |  ‘(’ [ExprsInParens ‘,’] PostfixExpr ‘*’ ‘)’ ;
+                    |  ‘(’ [ExprsInParens ‘,’] PostfixExpr ‘*’ ‘)’
 ```
 
 ## Compatibility considerations

docs/_docs/reference/contextual/context-bounds.md

@@ -40,7 +40,7 @@ done automatically under `-rewrite`.
 
 ## Syntax
 
-```ebnf
-TypeParamBounds   ::=  [SubtypeBounds] {ContextBound} ;
-ContextBound      ::=  ‘:’ Type ;
+```
+TypeParamBounds   ::=  [SubtypeBounds] {ContextBound}
+ContextBound      ::=  ‘:’ Type
 ```

docs/_docs/reference/contextual/context-functions-spec.md

@@ -6,11 +6,11 @@ movedTo: https://docs.scala-lang.org/scala3/reference/contextual/context-functio
 
 ## Syntax
 
-```ebnf
+```
 Type              ::=  ...
-                    |  FunArgTypes ‘?=>’ Type ;
+                    |  FunArgTypes ‘?=>’ Type
 Expr              ::=  ...
-                    |  FunParams ‘?=>’ Expr ;
+                    |  FunParams ‘?=>’ Expr
 ```
 
 Context function types associate to the right, e.g.

docs/_docs/reference/contextual/derivation.md

@@ -354,12 +354,12 @@ hand side of this definition in the same way as an instance defined in ADT compa
 
 ### Syntax
 
-```ebnf
-Template          ::=  InheritClauses [TemplateBody] ;
-EnumDef           ::=  id ClassConstr InheritClauses EnumBody ;
-InheritClauses    ::=  [‘extends’ ConstrApps] [‘derives’ QualId {‘,’ QualId}] ;
+```
+Template          ::=  InheritClauses [TemplateBody]
+EnumDef           ::=  id ClassConstr InheritClauses EnumBody
+InheritClauses    ::=  [‘extends’ ConstrApps] [‘derives’ QualId {‘,’ QualId}]
 ConstrApps        ::=  ConstrApp {‘with’ ConstrApp}
-                    |  ConstrApp {‘,’ ConstrApp} ;
+                    |  ConstrApp {‘,’ ConstrApp}
 ```
 
 **Note:** To align `extends` clauses and `derives` clauses, Scala 3 also allows multiple

docs/_docs/reference/contextual/extension-methods.md

@@ -285,20 +285,20 @@ def position(s: String)(ch: Char, n: Int): Int =
 Here are the syntax changes for extension methods and collective extensions relative
 to the [current syntax](../syntax.md).
 
-```ebnf
-BlockStat         ::=  ... | Extension ;
-TemplateStat      ::=  ... | Extension ;
-TopStat           ::=  ... | Extension ;
+```
+BlockStat         ::=  ... | Extension
+TemplateStat      ::=  ... | Extension
+TopStat           ::=  ... | Extension
 Extension         ::=  ‘extension’ [DefTypeParamClause] {UsingParamClause}
-                       ‘(’ DefParam ‘)’ {UsingParamClause} ExtMethods ;
-ExtMethods        ::=  ExtMethod | [nl] <<< ExtMethod {semi ExtMethod} >>> ;
-ExtMethod         ::=  {Annotation [nl]} {Modifier} ‘def’ DefDef ;
+                       ‘(’ DefParam ‘)’ {UsingParamClause} ExtMethods
+ExtMethods        ::=  ExtMethod | [nl] <<< ExtMethod {semi ExtMethod} >>>
+ExtMethod         ::=  {Annotation [nl]} {Modifier} ‘def’ DefDef
 ```
 
 In the above the notation `<<< ts >>>` in the production rule `ExtMethods` is defined as follows :
 
-```ebnf
-<<< ts >>>        ::=  ‘{’ ts ‘}’ | indent ts outdent ;
+```
+<<< ts >>>        ::=  ‘{’ ts ‘}’ | indent ts outdent
 ```
 
 `extension` is a soft keyword. It is recognized as a keyword only if it appears

docs/_docs/reference/contextual/given-imports.md

@@ -103,15 +103,15 @@ given instances once their user base has migrated.
 
 ### Syntax
 
-```ebnf
-Import            ::=  ‘import’ ImportExpr {‘,’ ImportExpr} ;
-Export            ::=  ‘export’ ImportExpr {‘,’ ImportExpr} ;
-ImportExpr        ::=  SimpleRef {‘.’ id} ‘.’ ImportSpec ;
+```
+Import            ::=  ‘import’ ImportExpr {‘,’ ImportExpr}
+Export            ::=  ‘export’ ImportExpr {‘,’ ImportExpr}
+ImportExpr        ::=  SimpleRef {‘.’ id} ‘.’ ImportSpec
 ImportSpec        ::=  NamedSelector
                     |  WildcardSelector
-                    | ‘{’ ImportSelectors) ‘}’ ;
-NamedSelector     ::=  id [‘as’ (id | ‘_’)] ;
-WildCardSelector  ::=  ‘*' | ‘given’ [InfixType] ;
+                    | ‘{’ ImportSelectors) ‘}’
+NamedSelector     ::=  id [‘as’ (id | ‘_’)]
+WildCardSelector  ::=  ‘*' | ‘given’ [InfixType]
 ImportSelectors   ::=  NamedSelector [‘,’ ImportSelectors]
-                    |  WildCardSelector {‘,’ WildCardSelector} ;
+                    |  WildCardSelector {‘,’ WildCardSelector}
 ```

docs/_docs/reference/contextual/givens.md

@@ -173,14 +173,14 @@ is created for each reference.
 
 Here is the syntax for given instances:
 
-```ebnf
+```
 TmplDef             ::=  ...
-                     |   ‘given’ GivenDef ;
+                     |   ‘given’ GivenDef
 GivenDef            ::=  [GivenSig] StructuralInstance
                      |   [GivenSig] AnnotType ‘=’ Expr
-                     |   [GivenSig] AnnotType ;
-GivenSig            ::=  [id] [DefTypeParamClause] {UsingParamClause} ‘:’ ;
-StructuralInstance  ::=  ConstrApp {‘with’ ConstrApp} ‘with’ TemplateBody ;
+                     |   [GivenSig] AnnotType
+GivenSig            ::=  [id] [DefTypeParamClause] {UsingParamClause} ‘:’
+StructuralInstance  ::=  ConstrApp {‘with’ ConstrApp} ‘with’ TemplateBody
 ```
 
 A given instance starts with the reserved word `given` and an optional _signature_. The signature

docs/_docs/reference/contextual/using-clauses.md

@@ -144,10 +144,10 @@ def summon[T](using x: T): x.type = x
 
 Here is the new syntax of parameters and arguments seen as a delta from the [standard context free syntax of Scala 3](../syntax.md). `using` is a soft keyword, recognized only at the start of a parameter or argument list. It can be used as a normal identifier everywhere else.
 
-```ebnf
-ClsParamClause      ::=  ... | UsingClsParamClause ;
-DefParamClauses     ::=  ... | UsingParamClause ;
-UsingClsParamClause ::=  ‘(’ ‘using’ (ClsParams | Types) ‘)’ ;
-UsingParamClause    ::=  ‘(’ ‘using’ (DefParams | Types) ‘)’ ;
-ParArgumentExprs    ::=  ... | ‘(’ ‘using’ ExprsInParens ‘)’ ;
+```
+ClsParamClause      ::=  ... | UsingClsParamClause
+DefParamClauses     ::=  ... | UsingParamClause
+UsingClsParamClause ::=  ‘(’ ‘using’ (ClsParams | Types) ‘)’
+UsingParamClause    ::=  ‘(’ ‘using’ (DefParams | Types) ‘)’
+ParArgumentExprs    ::=  ... | ‘(’ ‘using’ ExprsInParens ‘)’
 ```

docs/_docs/reference/enums/adts.md

@@ -154,18 +154,18 @@ The changes are specified below as deltas with respect to the Scala syntax given
 
  1. Enum definitions are defined as follows:
 
-    ```ebnf
-    TmplDef   ::=  `enum' EnumDef ;
-    EnumDef   ::=  id ClassConstr [`extends' [ConstrApps]] EnumBody ;
-    EnumBody  ::=  [nl] ‘{’ [SelfType] EnumStat {semi EnumStat} ‘}’ ;
+    ```
+    TmplDef   ::=  `enum' EnumDef
+    EnumDef   ::=  id ClassConstr [`extends' [ConstrApps]] EnumBody
+    EnumBody  ::=  [nl] ‘{’ [SelfType] EnumStat {semi EnumStat} ‘}’
     EnumStat  ::=  TemplateStat
-                |  {Annotation [nl]} {Modifier} EnumCase ;
+                |  {Annotation [nl]} {Modifier} EnumCase
     ```
 
  2. Cases of enums are defined as follows:
 
-    ```ebnf
-    EnumCase  ::=  `case' (id ClassConstr [`extends' ConstrApps]] | ids) ;
+    ```
+    EnumCase  ::=  `case' (id ClassConstr [`extends' ConstrApps]] | ids)
     ```
 
 ### Reference

docs/_docs/reference/experimental/named-typeargs-spec.md

@@ -10,11 +10,11 @@ In this section we give more details about the [named type arguments](named-type
 
 The addition to the grammar is:
 
-```ebnf
+```
 SimpleExpr1       ::=  ...
-                    |  SimpleExpr (TypeArgs | NamedTypeArgs) ;
-NamedTypeArgs     ::=  ‘[’ NamedTypeArg {‘,’ NamedTypeArg} ‘]’ ;
-NamedTypeArg      ::=  id ‘=’ Type ;
+                    |  SimpleExpr (TypeArgs | NamedTypeArgs)
+NamedTypeArgs     ::=  ‘[’ NamedTypeArg {‘,’ NamedTypeArg} ‘]’
+NamedTypeArg      ::=  id ‘=’ Type
 ```
 
 Note in particular that named arguments cannot be passed to type constructors:

docs/_docs/reference/metaprogramming/macros-spec.md

@@ -10,13 +10,13 @@ movedTo: https://docs.scala-lang.org/scala3/reference/metaprogramming/macros-spe
 
 Compared to the [Scala 3 reference grammar](../syntax.md)
 there are the following syntax changes:
-```ebnf
+```
 SimpleExpr      ::=  ...
                   |  ‘'’ ‘{’ Block ‘}’
                   |  ‘'’ ‘[’ Type ‘]’
-                  |  ‘$’ ‘{’ Block ‘}’ ;
+                  |  ‘$’ ‘{’ Block ‘}’
 SimpleType      ::=  ...
-                  |  ‘$’ ‘{’ Block ‘}’ ;
+                  |  ‘$’ ‘{’ Block ‘}’
 ```
 In addition, an identifier `$x` starting with a `$` that appears inside
 a quoted expression or type is treated as a splice `${x}` and a quoted identifier
@@ -57,36 +57,36 @@ extends simply-typed lambda calculus with quotes and splices.
 ### Syntax
 
 The syntax of terms, values, and types is given as follows:
-```ebnf
+```
 Terms         t  ::=  x                 variable
                       (x: T) => t       lambda
                       t t               application
                       't                quote
-                      $t                splice ;
+                      $t                splice
 
 Values        v  ::=  (x: T) => t       lambda
-                      'u                quote ;
+                      'u                quote
 
-Simple terms  u  ::=  x  |  (x: T) => u  |  u u  |  't ;
+Simple terms  u  ::=  x  |  (x: T) => u  |  u u  |  't
 
 Types         T  ::=  A                 base type
                       T -> T            function type
-                      expr T            quoted ;
+                      expr T            quoted
 ```
 Typing rules are formulated using a stack of environments
 `Es`. Individual environments `E` consist as usual of variable
 bindings `x: T`. Environments can be combined using the two
 combinators `'` and `$`.
-```ebnf
+```
 Environment   E  ::=  ()                empty
-                      E, x: T ;
+                      E, x: T
 
 Env. stack    Es ::=  ()                empty
                       E                 simple
-                      Es * Es           combined ;
+                      Es * Es           combined
 
 Separator     *  ::=  '
-                      $ ;
+                      $
 ```
 The two environment combinators are both associative with left and
 right identity `()`.
@@ -108,9 +108,9 @@ rule says that splice and quotes cancel each other out. The third rule
 is a context rule; it says that reduction is allowed in the hole `[ ]`
 position of an evaluation context.  Evaluation contexts `e` and
 splice evaluation context `e_s` are defined syntactically as follows:
-```ebnf
-Eval context    e    ::=  [ ]  |  e t  |  v e  |  'e_s[${e}] ;
-Splice context  e_s  ::=  [ ]  |  (x: T) => e_s  |  e_s t  |  u e_s ;
+```
+Eval context    e    ::=  [ ]  |  e t  |  v e  |  'e_s[${e}]
+Splice context  e_s  ::=  [ ]  |  (x: T) => e_s  |  e_s t  |  u e_s
 ```
 
 ### Typing rules

docs/_docs/reference/metaprogramming/simple-smp.md

@@ -23,21 +23,21 @@ replace evaluation contexts with contextual typing rules. While this
 is more verbose, it makes it easier to set up the meta theory.
 
 ## Syntax
-```ebnf
+```
 Terms         t  ::=  x                 variable
                       (x: T) => t       lambda
                       t t               application
                       ’t                quote
-                      ~t                splice ;
+                      ~t                splice
 
-Simple terms  u  ::=  x  |  (x: T) => u  |  u u ;
+Simple terms  u  ::=  x  |  (x: T) => u  |  u u
 
 Values        v  ::=  (x: T) => t       lambda
-                      ’u                quoted value ;
+                      ’u                quoted value
 
 Types         T  ::=  A                 base type
                       T -> T            function type
-                      ’T                quoted type ;
+                      ’T                quoted type
 ```
 ## Operational semantics
 

docs/_docs/reference/new-types/dependent-function-types-spec.md

@@ -8,11 +8,11 @@ Initial implementation in [PR #3464](https://github.com/lampepfl/dotty/pull/3464
 
 ## Syntax
 
-```ebnf
+```
 FunArgTypes       ::=  InfixType
                     |  ‘(’ [ FunArgType {',' FunArgType } ] ‘)’
-                    |  ‘(’ TypedFunParam {',' TypedFunParam } ‘)’ ;
-TypedFunParam     ::=  id ‘:’ Type ;
+                    |  ‘(’ TypedFunParam {',' TypedFunParam } ‘)’
+TypedFunParam     ::=  id ‘:’ Type
 ```
 
 Dependent function types associate to the right, e.g.

docs/_docs/reference/new-types/intersection-types-spec.md

@@ -12,9 +12,9 @@ with the usual precedence and subject to usual resolving rules.
 Unless shadowed by another definition, it resolves to the type `scala.&`,
 which acts as a type alias to an internal representation of intersection types.
 
-```ebnf
-Type              ::=  ...| InfixType ;
-InfixType         ::=  RefinedType {id [nl] RefinedType} ;
+```
+Type              ::=  ...| InfixType
+InfixType         ::=  RefinedType {id [nl] RefinedType}
 ```
 
 ## Subtyping Rules