toml: fix parsing of alphanumeric keys (#12517)

vlib/toml/tests/burntsushi.toml-test_test.v

@@ -35,8 +35,6 @@ const (
 		// Inline-table
 		'inline-table/multiline.toml',
 		// Key
-		'key/numeric-dotted.toml',
-		'key/alphanum.toml',
 		'key/escapes.toml',
 	]
 

vlib/toml/tests/key_test.v

@@ -0,0 +1,27 @@
+import os
+import toml
+import toml.to
+
+fn test_keys() {
+	toml_file :=
+		os.real_path(os.join_path(os.dir(@FILE), 'testdata', os.file_name(@FILE).all_before_last('.'))) +
+		'.toml'
+	toml_doc := toml.parse(toml_file) or { panic(err) }
+
+	mut value := toml_doc.value('34-11')
+	assert value.int() == 23
+
+	value = toml_doc.value('1.2')
+	assert value.int() == 3
+
+	value = toml_doc.value('34-12.2')
+	assert value.int() == 42
+
+	toml_json := to.json(toml_doc)
+	out_file :=
+		os.real_path(os.join_path(os.dir(@FILE), 'testdata', os.file_name(@FILE).all_before_last('.'))) +
+		'.out'
+	out_file_json := os.read_file(out_file) or { panic(err) }
+	println(toml_json)
+	assert toml_json == out_file_json
+}

vlib/toml/tests/testdata/key_test.out

@@ -0,0 +1 @@
+{ "34-11": 23, "1": { "2": 3 }, "34-12": { "2": 42 }, "34-20": { }, "5": { "6": { } }, "34-13": { "2": { } } }

vlib/toml/tests/testdata/key_test.toml

@@ -0,0 +1,9 @@
+34-11 = 23 # came out as "34-11 " = 23
+1.2 = 3 # came out as "1.2" = 3
+34-12.2 = 42 # came out as "34-12.2" = 42
+
+[34-20]
+
+[5.6]
+
+[34-13.2]