Include trailing comma in width for table field

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Fixed
 - Fixed indentation of type callback specifier parameters when parameters have leading comment trivia. ([#278](https://github.com/JohnnyMorganz/StyLua/issues/278))
+- Fixed trailing comma not being taken into account when determining the width of a field in a multiline table. ([#282](https://github.com/JohnnyMorganz/StyLua/issues/282))
 
 ## [0.11.0] - 2021-09-16
 ### Changed

src/formatters/table.rs

@@ -253,7 +253,7 @@ where
         let (field, punctuation) = (pair.value(), pair.punctuation());
 
         // Reset the shape onto a new line, as we are a new field
-        shape = shape.reset();
+        shape = shape.reset().add_width(1); // Add 1 to include the trailing comma at the end
 
         // Format the field
         let (formatted_field, mut trailing_trivia) = formatter(ctx, field, table_type, shape);

tests/inputs/table-5.lua

@@ -0,0 +1,4 @@
+a = {
+	key1 = string.format("test", "test", "test", "test", "test", "test", "test", "test", "test", "test", variable_names),
+	key2 = string.format("test", "test", "test", "test", "test", "test", "test", "test", "test", "test", variable_names),
+}

tests/snapshots/tests__standard@table-5.lua.snap

@@ -0,0 +1,34 @@
+---
+source: tests/tests.rs
+expression: format(&contents)
+
+---
+a = {
+	key1 = string.format(
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		variable_names
+	),
+	key2 = string.format(
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		"test",
+		variable_names
+	),
+}
+