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helpers: Fix version string for Hugo 0.20 and similar

Fixes #3112

--- a/helpers/hugo.go

+++ b/helpers/hugo.go

@@ -50,14 +50,14 @@

 func hugoVersion(version float32, patchVersion int, suffix string) string {

 	if patchVersion > 0 {

-		return fmt.Sprintf("%.2g.%d%s", version, patchVersion, suffix)

+		return fmt.Sprintf("%.2f.%d%s", version, patchVersion, suffix)

 	}

-	return fmt.Sprintf("%.2g%s", version, suffix)

+	return fmt.Sprintf("%.2f%s", version, suffix)

 }

 func hugoVersionNoSuffix(version float32, patchVersion int) string {

 	if patchVersion > 0 {

-		return fmt.Sprintf("%.2g.%d", version, patchVersion)

+		return fmt.Sprintf("%.2f.%d", version, patchVersion)

 	}

-	return fmt.Sprintf("%.2g", version)

+	return fmt.Sprintf("%.2f", version)

 }

--- a/helpers/hugo_test.go

+++ b/helpers/hugo_test.go

@@ -22,7 +22,7 @@

 func TestHugoVersion(t *testing.T) {

 	assert.Equal(t, "0.15-DEV", hugoVersion(0.15, 0, "-DEV"))

 	assert.Equal(t, "0.17", hugoVersionNoSuffix(0.16+0.01, 0))

-

+	assert.Equal(t, "0.20", hugoVersionNoSuffix(0.20, 0))

 	assert.Equal(t, "0.15.2-DEV", hugoVersion(0.15, 2, "-DEV"))

 	assert.Equal(t, "0.17.3", hugoVersionNoSuffix(0.16+0.01, 3))

 }