cmd/compile/internal/syntax: fix/update various comments

Change-Id: I30b448c8fcdbad94afcd7ff0dfc5cfebb485bdd7
Reviewed-on: https://go-review.googlesource.com/c/go/+/538855
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>

src/cmd/compile/internal/syntax/parser.go

@@ -1147,7 +1147,7 @@ loop:
 			}
 
 			// x[i:...
-			// For better error message, don't simply use p.want(_Colon) here (issue #47704).
+			// For better error message, don't simply use p.want(_Colon) here (go.dev/issue/47704).
 			if !p.got(_Colon) {
 				p.syntaxError("expected comma, : or ]")
 				p.advance(_Comma, _Colon, _Rbrack)
@@ -2322,7 +2322,7 @@ func (p *parser) header(keyword token) (init SimpleStmt, cond Expr, post SimpleS
 			// asking for a '{' rather than a ';' here leads to a better error message
 			p.want(_Lbrace)
 			if p.tok != _Lbrace {
-				p.advance(_Lbrace, _Rbrace) // for better synchronization (e.g., issue #22581)
+				p.advance(_Lbrace, _Rbrace) // for better synchronization (e.g., go.dev/issue/22581)
 			}
 		}
 		if keyword == _For {

src/cmd/compile/internal/syntax/testdata/issue23434.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Test case for issue 23434: Better synchronization of
+// Test case for go.dev/issue/23434: Better synchronization of
 // parser after missing type. There should be exactly
 // one error each time, with now follow errors.
 
@@ -12,7 +12,7 @@ type T /* ERROR unexpected newline */
 
 type Map map[int] /* ERROR unexpected newline */
 
-// Examples from #23434:
+// Examples from go.dev/issue/23434:
 
 func g() {
 	m := make(map[string] /* ERROR unexpected ! */ !)

src/cmd/compile/internal/syntax/testdata/issue31092.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Test cases for issue 31092: Better synchronization of
+// Test cases for go.dev/issue/31092: Better synchronization of
 // parser after seeing an := rather than an = in a const,
 // type, or variable declaration.
 

src/cmd/compile/internal/syntax/testdata/map2.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// This file is like map.go2, but instead if importing chans, it contains
+// This file is like map.go, but instead of importing chans, it contains
 // the necessary functionality at the end of the file.
 
 // Package orderedmap provides an ordered map, implemented as a binary tree.
@@ -23,7 +23,7 @@ type node[K, V any] struct {
 
 // New returns a new map.
 func New[K, V any](compare func(K, K) int) *Map[K, V] {
-        return &Map[K, V]{compare: compare}
+	return &Map[K, V]{compare: compare}
 }
 
 // find looks up key in the map, and returns either a pointer
@@ -85,7 +85,7 @@ func (m *Map[K, V]) InOrder() *Iterator[K, V] {
 		// Stop sending values if sender.Send returns false,
 		// meaning that nothing is listening at the receiver end.
 		return f(n.left) &&
-                        sender.Send(keyValue[K, V]{n.key, n.val}) &&
+			sender.Send(keyValue[K, V]{n.key, n.val}) &&
 			f(n.right)
 	}
 	go func() {
@@ -119,7 +119,7 @@ func chans_Ranger[T any]() (*chans_Sender[T], *chans_Receiver[T])
 // A sender is used to send values to a Receiver.
 type chans_Sender[T any] struct {
 	values chan<- T
-	done <-chan bool
+	done   <-chan bool
 }
 
 func (s *chans_Sender[T]) Send(v T) bool {
@@ -137,10 +137,10 @@ func (s *chans_Sender[T]) Close() {
 
 type chans_Receiver[T any] struct {
 	values <-chan T
-	done chan<- bool
+	done   chan<- bool
 }
 
 func (r *chans_Receiver[T]) Next() (T, bool) {
 	v, ok := <-r.values
 	return v, ok
-}
+}

src/cmd/compile/internal/syntax/testdata/tparams.go

@@ -23,7 +23,7 @@ func f[a t, b t, c /* ERROR missing type constraint */ ]()
 
 func f[a b,  /* ERROR expected ] */ 0] ()
 
-// issue #49482
+// go.dev/issue/49482
 type (
 	t[a *[]int] struct{}
 	t[a *t,] struct{}
@@ -35,7 +35,7 @@ type (
 	t[a *struct{}|~t] struct{}
 )
 
-// issue #51488
+// go.dev/issue/51488
 type (
 	t[a *t|t,] struct{}
 	t[a *t|t, b t] struct{}

src/cmd/compile/internal/syntax/testdata/typeset.go

@@ -44,7 +44,7 @@ type (
         _[_ t|~struct{}] t
         _[_ ~t|~struct{}] t
 
-        // test cases for issue #49175
+        // test cases for go.dev/issue/49175
         _[_ []t]t
         _[_ [1]t]t
         _[_ ~[]t]t
@@ -52,7 +52,7 @@ type (
         t [ /* ERROR type parameters must be named */ t[0]]t
 )
 
-// test cases for issue #49174
+// test cases for go.dev/issue/49174
 func _[_ t]() {}
 func _[_ []t]() {}
 func _[_ [1]t]() {}