Fix .mo contexts

Fixes #3590

- `get("key")`
- `get("context", "key")`

tests/core/assets/I18N/mixed_context.po

@@ -0,0 +1,18 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: 0.1.0\n"
+"PO-Revision-Date: 2024-04-13 11:13+0200\n"
+"Last-Translator: Someone <someone@somewhere.com>\n"
+"Language-Team: English\n"
+"Language: en_IE\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+msgctxt "Context"
+msgid "Message1"
+msgstr "This is message 1 with Context"
+
+msgid "Message1"
+msgstr "This is message 1 without Context"

tests/core/assets/I18N/plur.po

@@ -0,0 +1,17 @@
+msgid ""
+msgstr ""
+"Project-Id-Version: 0.1.0\n"
+"PO-Revision-Date: 2024-04-13 11:13+0200\n"
+"Last-Translator: Someone <someone@somewhere.com>\n"
+"Language-Team: English\n"
+"Language: it_IT\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=3; plural=(n == 1 ? 0 : n != 0 && n % 1000000 == 0 ? 1 : 2);\n"
+
+msgid "Message1"
+msgid_plural "Message1/plural"
+msgstr[0] "This is message 1"
+msgstr[1] "This is message 1 - plural A"
+msgstr[2] "This is message 1 - plural B"

tests/core/text/i18n/test_core_text_i18n.odin

@@ -72,6 +72,20 @@ TESTS := []Test_Suite{
 		},
 	},
 
+	{
+		file   = "assets/I18N/mixed_context.mo",
+		loader = i18n.parse_mo_file,
+		plural = nil,
+		tests  = {
+			// These are in the catalog.
+			{"",        "Message1",               "This is message 1 without Context", 1},
+			{"Context", "Message1",               "This is message 1 with Context",    1},
+
+			// This isn't in the catalog, so should ruturn the key.
+			{"", "Come visit us on Discord!",     "Come visit us on Discord!",         1},
+		},
+	},
+
 	{
 		file   = "assets/I18N/nl_NL.mo",
 		loader = i18n.parse_mo_file,