tpl: Pull in Go 1.18 patch that fixes the "no space in {{ continue }}…

… and {{ break }}" bug

scripts/fork_go_templates/main.go

@@ -17,7 +17,7 @@ import (
 )
 
 func main() {
-	// The current is built with Go tag go1.18 4aa1efed4853ea067d665a952eee77c52faac774
+	// The current is built with 41a82aa9c3 text/template/parse: allow space after continue or break
 	fmt.Println("Forking ...")
 	defer fmt.Println("Done ...")
 

tpl/internal/go_templates/htmltemplate/escape.go

@@ -45,7 +45,7 @@ func escapeTemplate(tmpl *Template, node parse.Node, name string) error {
 }
 
 // evalArgs formats the list of arguments into a string. It is equivalent to
-// fmt.Sprint(args...), except that it deferences all pointers.
+// fmt.Sprint(args...), except that it dereferences all pointers.
 func evalArgs(args ...any) string {
 	// Optimization for simple common case of a single string argument.
 	if len(args) == 1 {
@@ -691,7 +691,7 @@ func (e *escaper) escapeTemplateBody(c context, t *template.Template) (context,
 		return c.eq(c1)
 	}
 	// We need to assume an output context so that recursive template calls
-	// take the fast path out of escapeTree instead of infinitely recursing.
+	// take the fast path out of escapeTree instead of infinitely recurring.
 	// Naively assuming that the input context is the same as the output
 	// works >90% of the time.
 	e.output[t.Name()] = c

tpl/internal/go_templates/texttemplate/parse/parse.go

@@ -415,8 +415,8 @@ func (t *Tree) action() (n Node) {
 //	{{break}}
 // Break keyword is past.
 func (t *Tree) breakControl(pos Pos, line int) Node {
-	if token := t.next(); token.typ != itemRightDelim {
-		t.unexpected(token, "in {{break}}")
+	if token := t.nextNonSpace(); token.typ != itemRightDelim {
+		t.unexpected(token, "{{break}}")
 	}
 	if t.rangeDepth == 0 {
 		t.errorf("{{break}} outside {{range}}")
@@ -428,8 +428,8 @@ func (t *Tree) breakControl(pos Pos, line int) Node {
 //	{{continue}}
 // Continue keyword is past.
 func (t *Tree) continueControl(pos Pos, line int) Node {
-	if token := t.next(); token.typ != itemRightDelim {
-		t.unexpected(token, "in {{continue}}")
+	if token := t.nextNonSpace(); token.typ != itemRightDelim {
+		t.unexpected(token, "{{continue}}")
 	}
 	if t.rangeDepth == 0 {
 		t.errorf("{{continue}} outside {{range}}")

tpl/internal/go_templates/texttemplate/parse/parse_test.go

@@ -263,6 +263,10 @@ var parseTests = []parseTest{
 	{"newline in pipeline", "{{\n\"x\"\n|\nprintf\n}}", noError, `{{"x" | printf}}`},
 	{"newline in comment", "{{/*\nhello\n*/}}", noError, ""},
 	{"newline in comment", "{{-\n/*\nhello\n*/\n-}}", noError, ""},
+	{"spaces around continue", "{{range .SI}}{{.}}{{ continue }}{{end}}", noError,
+		`{{range .SI}}{{.}}{{continue}}{{end}}`},
+	{"spaces around break", "{{range .SI}}{{.}}{{ break }}{{end}}", noError,
+		`{{range .SI}}{{.}}{{break}}{{end}}`},
 
 	// Errors.
 	{"unclosed action", "hello{{range", hasError, ""},

tpl/tplimpl/integration_test.go

@@ -75,9 +75,10 @@ title: "P1"
 -- layouts/partials/counter.html --
 {{ if .Scratch.Get "counter" }}{{ .Scratch.Add "counter" 1 }}{{ else }}{{ .Scratch.Set "counter" 1 }}{{ end }}{{ return true }}
 -- layouts/_default/single.html --
-{{/* Note no spaces in {{continue}} or {{break}}, see https://github.com/golang/go/issues/51670 */}}
 continue:{{ range seq 5 }}{{ if eq . 2 }}{{continue}}{{ end }}{{ . }}{{ end }}:END:
 break:{{ range seq 5 }}{{ if eq . 2 }}{{break}}{{ end }}{{ . }}{{ end }}:END:
+continue2:{{ range seq 5 }}{{ if eq . 2 }}{{ continue }}{{ end }}{{ . }}{{ end }}:END:
+break2:{{ range seq 5 }}{{ if eq . 2 }}{{ break }}{{ end }}{{ . }}{{ end }}:END:
 
 counter1: {{ partial "counter.html" . }}/{{ .Scratch.Get "counter" }}
 and1: {{ if (and false (partial "counter.html" .)) }}true{{ else }}false{{ end }}
@@ -103,6 +104,8 @@ counter2: {{ .Scratch.Get "counter" }}
 	b.AssertFileContent("public/p1/index.html", `
 continue:1345:END:
 break:1:END:
+continue2:1345:END:
+break2:1:END:
 counter1: true/1
 and1: false
 or1: true