Handle string interpolation table expression

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fixed handling of floor division (`//`) syntax when only Luau FFlag is enabled
+- Fixed missing space when table is inside of Luau interpolated string expression (`{{` is invalid syntax)
 
 ## [0.19.1] - 2023-11-15
 

src/formatters/expression.rs

@@ -823,9 +823,18 @@ fn format_interpolated_string(
         let literal = format_token_reference(ctx, &segment.literal, shape);
         shape = shape + literal.to_string().len();
 
-        let expression = format_expression(ctx, &segment.expression, shape);
+        let mut expression = format_expression(ctx, &segment.expression, shape);
         shape = shape.take_last_line(&expression);
 
+        // If expression is a table constructor, then ensure a space is added beforehand
+        // since `{{` syntax is not permitted
+        if let Expression::TableConstructor { .. } = expression {
+            expression =
+                expression.update_leading_trivia(FormatTriviaType::Append(vec![Token::new(
+                    TokenType::spaces(1),
+                )]))
+        }
+
         segments.push(InterpolatedStringSegment {
             literal,
             expression,

tests/inputs-luau/string-interpolation-table.lua

@@ -0,0 +1 @@
+local x = `{ {1} }`

tests/snapshots/tests__luau@string-interpolation-table.lua.snap

@@ -0,0 +1,7 @@
+---
+source: tests/tests.rs
+expression: format(&contents)
+input_file: tests/inputs-luau/string-interpolation-table.lua
+---
+local x = `{ { 1 }}`
+