fix: directive format regression

Restores previous directive regexp expectations.

Related to mvdan#327
Fixes mvdan#331

Author: ldez

format/format.go

@@ -327,14 +327,14 @@ func (f *fumpter) lineEnd(line int) token.Pos {
 var rxCommentDirective = regexp.MustCompile(
 	`^(?:` +
 		`[a-z-]+:[a-z]+` +
-		`|export` +
-		`|extern` +
-		`|line` +
-		`|no(?:inspection|lint)` +
-		`|#nosec` +
-		`|NOSONAR` +
-		`|sys(?:nb)?` +
-		`)\b`)
+		`|export\b` +
+		`|extern\b` +
+		`|line\b` +
+		`|no(?:inspection|lint)\b` +
+		`|#nosec\b` +
+		`|NOSONAR\b` +
+		`|sys(?:nb)?\b` +
+		`)`)
 
 func (f *fumpter) applyPre(c *astutil.Cursor) {
 	f.splitLongLine(c)

testdata/script/directives.txtar

@@ -0,0 +1,109 @@
+exec gofumpt -w foo.go
+cmp foo.go foo.go.golden
+
+-- foo.go --
+package main
+
+//foo:bar_one
+//foo:bar-two
+//foo:bar01
+//foo:barOne
+//foo:barTwo
+func main() {
+	//foo:bar_one
+	//foo:bar-two
+	//foo:bar01
+	//foo:barOne
+	//foo:barTwo
+}
+
+//foo: bar_one
+func a() {
+	//foo: bar_one
+}
+
+//foo: bar_one
+//foo:bar
+func b() {
+	//foo: bar_one
+	//foo:bar
+}
+
+//noinspection
+func c() {
+	//noinspection
+}
+
+//nolint
+func d() {
+	//nolint
+}
+
+//#nosec
+func e() {
+	//#nosec
+}
+
+//NOSONAR
+func f() {
+	//NOSONAR
+}
+
+//foo
+func h() {
+	//foo
+}
+
+-- foo.go.golden --
+package main
+
+//foo:bar_one
+//foo:bar-two
+//foo:bar01
+//foo:barOne
+//foo:barTwo
+func main() {
+	//foo:bar_one
+	//foo:bar-two
+	//foo:bar01
+	//foo:barOne
+	//foo:barTwo
+}
+
+// foo: bar_one
+func a() {
+	// foo: bar_one
+}
+
+// foo: bar_one
+//
+//foo:bar
+func b() {
+	//foo: bar_one
+	//foo:bar
+}
+
+// noinspection
+func c() {
+	//noinspection
+}
+
+// nolint
+func d() {
+	//nolint
+}
+
+// #nosec
+func e() {
+	//#nosec
+}
+
+// NOSONAR
+func f() {
+	//NOSONAR
+}
+
+// foo
+func h() {
+	// foo
+}