From cdb06e2eabb9e3551495f7c4a417bbf31aaa78f3 Mon Sep 17 00:00:00 2001
From: Virgil <virgil@lethean.io>
Date: Thu, 2 Apr 2026 08:31:47 +0000
Subject: [PATCH] fix(i18n): trim padded composition inputs

Co-Authored-By: Virgil <virgil@lethean.io>
---
 grammar.go      | 21 ++++++++++++++-------
 grammar_test.go | 21 +++++++++++++++++++++
 2 files changed, 35 insertions(+), 7 deletions(-)

diff --git a/grammar.go b/grammar.go
index 4af761b..8834a70 100644
--- a/grammar.go
+++ b/grammar.go
@@ -485,16 +485,16 @@ func applyRegularPlural(noun string) string {
 //	Article("user")     // "a" (sounds like "yoo-zer")
 //	Article("hour")     // "an" (silent h)
 func Article(word string) string {
+	word = core.Trim(word)
 	if word == "" {
 		return ""
 	}
-	trimmed := core.Trim(word)
-	lower := core.Lower(trimmed)
+	lower := core.Lower(word)
 	if article, ok := articleForCurrentLanguage(lower, word); ok {
 		return article
 	}
-	if isInitialism(trimmed) {
-		if initialismUsesVowelSound(trimmed) {
+	if isInitialism(word) {
+		if initialismUsesVowelSound(word) {
 			return "an"
 		}
 		return "a"
@@ -796,6 +796,7 @@ func Quote(s string) string {
 
 // ArticlePhrase prefixes a noun phrase with the correct article.
 func ArticlePhrase(word string) string {
+	word = core.Trim(word)
 	if word == "" {
 		return ""
 	}
@@ -809,12 +810,12 @@ func ArticlePhrase(word string) string {
 // For languages such as French, this respects gendered articles, plural forms,
 // and elision rules when grammar data is available.
 func DefiniteArticle(word string) string {
+	word = core.Trim(word)
 	if word == "" {
 		return ""
 	}
-	trimmed := core.Trim(word)
-	lower := core.Lower(trimmed)
-	if article, ok := definiteArticleForCurrentLanguage(lower, trimmed); ok {
+	lower := core.Lower(word)
+	if article, ok := definiteArticleForCurrentLanguage(lower, word); ok {
 		return article
 	}
 	lang := currentLangForGrammar()
@@ -827,6 +828,7 @@ func DefiniteArticle(word string) string {
 
 // DefinitePhrase prefixes a noun phrase with the correct definite article.
 func DefinitePhrase(word string) string {
+	word = core.Trim(word)
 	if word == "" {
 		return ""
 	}
@@ -938,6 +940,7 @@ func ProgressSubject(verb, subject string) string {
 		return ""
 	}
 	suffix := getPunct(lang, "progress", "...")
+	subject = core.Trim(subject)
 	if subject == "" {
 		return Title(g) + suffix
 	}
@@ -950,6 +953,7 @@ func ActionResult(verb, subject string) string {
 	if p == "" {
 		return ""
 	}
+	subject = core.Trim(subject)
 	if subject == "" {
 		return Title(p)
 	}
@@ -958,12 +962,14 @@ func ActionResult(verb, subject string) string {
 
 // ActionFailed returns a failure message: "Failed to delete file"
 func ActionFailed(verb, subject string) string {
+	verb = core.Trim(verb)
 	if verb == "" {
 		return ""
 	}
 	lang := currentLangForGrammar()
 	verb = renderWord(lang, verb)
 	prefix := failedPrefix(lang)
+	subject = core.Trim(subject)
 	if subject == "" {
 		return prefix + " " + verb
 	}
@@ -980,6 +986,7 @@ func failedPrefix(lang string) string {
 
 // Label returns a label with suffix: "Status:" (EN) or "Statut :" (FR)
 func Label(word string) string {
+	word = core.Trim(word)
 	if word == "" {
 		return ""
 	}
diff --git a/grammar_test.go b/grammar_test.go
index 436768c..f75bb21 100644
--- a/grammar_test.go
+++ b/grammar_test.go
@@ -723,6 +723,27 @@ func TestLabel(t *testing.T) {
 	}
 }
 
+func TestCompositionHelpersTrimWhitespace(t *testing.T) {
+	svc, err := New()
+	if err != nil {
+		t.Fatalf("New() failed: %v", err)
+	}
+	SetDefault(svc)
+
+	if got, want := Label("  status  "), "Status:"; got != want {
+		t.Fatalf("Label(%q) = %q, want %q", "  status  ", got, want)
+	}
+	if got, want := Article("  error  "), "an"; got != want {
+		t.Fatalf("Article(%q) = %q, want %q", "  error  ", got, want)
+	}
+	if got, want := ArticlePhrase("  go_mod  "), "a go.mod"; got != want {
+		t.Fatalf("ArticlePhrase(%q) = %q, want %q", "  go_mod  ", got, want)
+	}
+	if got, want := ActionFailed("  delete  ", "  file  "), "Failed to delete file"; got != want {
+		t.Fatalf("ActionFailed(%q, %q) = %q, want %q", "  delete  ", "  file  ", got, want)
+	}
+}
+
 func TestProgress(t *testing.T) {
 	svc, err := New()
 	if err != nil {
-- 
2.45.3