Don't attempt to hang a prefix string unnecessarily

CHANGELOG.md

@@ -13,10 +13,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed leading comments lost from an expression when excessive parentheses are removed from it ([#530](https://github.com/JohnnyMorganz/StyLua/issues/530))
 - Fixed comments present in a complex expression not forcing multiline hanging leading to a syntax error ([#524](https://github.com/JohnnyMorganz/StyLua/issues/524))
 - Fixed unnecessary break on `else` in an if-expression when the expression contains a comment ([#520](https://github.com/JohnnyMorganz/StyLua/issues/520))
-- Take into account the extra line created when hanging at equals token in an assignment. This should prevent unnecessary hanging ([#542](https://github.com/JohnnyMorganz/StyLua/issues/542))
+- Take into account the extra line created when hanging at equals token in an assignment. This should prevent unnecessary hanging ([#542](https://github.com/JohnnyMorganz/StyLua/issues/542)) 
 - Fixed comments added to a newly created trailing comment not being formatted ([#547](https://github.com/JohnnyMorganz/StyLua/issues/547))
 - Fixed call chain with a small prefix not being kept inlined causing unstable formatting ([#514](https://github.com/JohnnyMorganz/StyLua/issues/514))
-- Fix shape computation for table fields causing unnecessary expansion ([#551](https://github.com/JohnnyMorganz/StyLua/issues/551))
+- Fixed shape computation for table fields causing unnecessary expansion ([#551](https://github.com/JohnnyMorganz/StyLua/issues/551))
+- Fixed hanging the prefix string in `("str"):call` unnecessarily when it provides no benefit ([#508](https://github.com/JohnnyMorganz/StyLua/issues/508))
 
 ## [0.14.2] - 2022-07-27
 

src/formatters/expression.rs

@@ -368,6 +368,15 @@ pub fn format_index(ctx: &Context, index: &Index, shape: Shape) -> Index {
     }
 }
 
+// Checks if this is a string (allows strings wrapped in parentheses)
+fn is_string(expression: &Expression) -> bool {
+    match expression {
+        Expression::Value { value, .. } => matches!(&**value, Value::String(_)),
+        Expression::Parentheses { expression, .. } => is_string(expression),
+        _ => false,
+    }
+}
+
 /// Formats a Prefix Node
 pub fn format_prefix(ctx: &Context, prefix: &Prefix, shape: Shape) -> Prefix {
     match prefix {
@@ -376,7 +385,7 @@ pub fn format_prefix(ctx: &Context, prefix: &Prefix, shape: Shape) -> Prefix {
                 format_expression_internal(ctx, expression, ExpressionContext::Prefix, shape);
             let singeline_shape = shape.take_first_line(&strip_trivia(&singleline_format));
 
-            if singeline_shape.over_budget() {
+            if singeline_shape.over_budget() && !is_string(expression) {
                 Prefix::Expression(format_hanging_expression_(
                     ctx,
                     expression,

tests/inputs/hang-prefix-ignore-string.lua

@@ -0,0 +1,21 @@
+-- https://github.com/JohnnyMorganz/StyLua/issues/508
+exports.ScalarLeafsRule = function(context)
+	return {
+			Field = function(_self, node)
+					if type_ then
+							if not selectionSet then
+									context:reportError(
+											GraphQLError.new(
+													('Field "%s" of type "%s" must have a selection of subfields. Did you mean "%s { ... }"?'):format(
+															fieldName,
+															typeStr,
+															fieldName
+													),
+													node
+											)
+									)
+							end
+					end
+			end,
+	}
+end

tests/snapshots/tests__standard@hang-prefix-ignore-string.lua.snap

@@ -0,0 +1,26 @@
+---
+source: tests/tests.rs
+expression: format(&contents)
+---
+-- https://github.com/JohnnyMorganz/StyLua/issues/508
+exports.ScalarLeafsRule = function(context)
+	return {
+		Field = function(_self, node)
+			if type_ then
+				if not selectionSet then
+					context:reportError(
+						GraphQLError.new(
+							('Field "%s" of type "%s" must have a selection of subfields. Did you mean "%s { ... }"?'):format(
+								fieldName,
+								typeStr,
+								fieldName
+							),
+							node
+						)
+					)
+				end
+			end
+		end,
+	}
+end
+