Update dependency prettier to v3.9.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
prettier (source)	3.5.2 → 3.9.1

---

Release Notes

prettier/prettier (prettier)

v3.9.1

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v3.9.0

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🔗 Release Notes

v3.8.5

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v3.8.4

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Markdown: Fix blank lines between list items and nested sub-lists being removed in Markdown/MDX (#​17746 by @​byplayer)

Prettier was removing blank lines between list items and their nested sub-lists, converting loose lists into tight lists and changing their semantic meaning.

<!-- Input -->
- a

  - b

- c

  - d

<!-- Prettier 3.8.3 -->
- a
  - b
- c
  - d

<!-- Prettier 3.8.4 -->
- a

  - b

- c

  - d

v3.8.3

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SCSS: Prevent trailing comma in if() function (#​18471 by @​kovsu)

// Input
$value: if(sass(false): 1; else: -1);

// Prettier 3.8.2
$value: if(
  sass(false): 1; else: -1,
);

// Prettier 3.8.3
$value: if(sass(false): 1; else: -1);

v3.8.2

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Angular: Support Angular v21.2 (#​18722, #​19034 by @​fisker)

Exhaustive typechecking with @default never;

<!-- Input -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}

<!-- Prettier 3.8.1 -->
SyntaxError: Incomplete block "default never". If you meant to write the @&#8203; character, you should use the "&#&#8203;64;" HTML entity instead. (3:3)

<!-- Prettier 3.8.2 -->
@&#8203;switch (foo) {
  @&#8203;case (1) {}
  @&#8203;default never;
}

arrow function and instanceof expressions.

<!-- Input -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.1 -->
@&#8203;let fn = (a) =>        a?    1:2;

{{ fn ( a         instanceof b)}}

<!-- Prettier 3.8.2 -->
@&#8203;let fn = (a) => (a ? 1 : 2);

{{ fn(a instanceof b) }}

v3.8.1

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Include available printers in plugin type declarations (#​18706 by @​porada)

// Input
import * as prettierPluginEstree from "prettier/plugins/estree";

// Prettier 3.8.0
// Property 'printers' does not exist on type 'typeof import("prettier/plugins/estree")'. ts(2339)
prettierPluginEstree.printers.estree; //=> any

// Prettier 3.8.1
prettierPluginEstree.printers.estree; //=> Printer
prettierPluginEstree.printers["estree-json"]; //=> Printer

v3.8.0

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🔗 Release Notes

v3.7.4

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LWC: Avoid quote around interpolations (#​18383 by @​kovsu)

<!-- Input -->
<div foo={bar}>   </div>

<!-- Prettier 3.7.3 (--embedded-language-formatting off) -->
<div foo="{bar}"></div>

<!-- Prettier 3.7.4 (--embedded-language-formatting off) -->
<div foo={bar}></div>

TypeScript: Fix comment inside union type gets duplicated (#​18393 by @​fisker)

// Input
type Foo = (/** comment */ a | b) | c;

// Prettier 3.7.3
type Foo = /** comment */ (/** comment */ a | b) | c;

// Prettier 3.7.4
type Foo = /** comment */ (a | b) | c;

TypeScript: Fix unstable comment print in union type comments (#​18395 by @​fisker)

// Input
type X = (A | B) & (
  // comment
  A | B
);

// Prettier 3.7.3 (first format)
type X = (A | B) &
  (// comment
  A | B);

// Prettier 3.7.3 (second format)
type X = (
  | A
  | B // comment
) &
  (A | B);

// Prettier 3.7.4
type X = (A | B) &
  // comment
  (A | B);

v3.7.3

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API: Fix prettier.getFileInfo() change that breaks VSCode extension (#​18375 by @​fisker)

An internal refactor accidentally broke the VSCode extension plugin loading.

v3.7.2

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JavaScript: Fix string print when switching quotes (#​18351 by @​fisker)

// Input
console.log("A descriptor\\'s .kind must be \"method\" or \"field\".")

// Prettier 3.7.1
console.log('A descriptor\\'s .kind must be "method" or "field".');

// Prettier 3.7.2
console.log('A descriptor\\\'s .kind must be "method" or "field".');

JavaScript: Preserve quote for embedded HTML attribute values (#​18352 by @​kovsu)

// Input
const html = /* HTML */ ` <div class="${styles.banner}"></div> `;

// Prettier 3.7.1
const html = /* HTML */ ` <div class=${styles.banner}></div> `;

// Prettier 3.7.2
const html = /* HTML */ ` <div class="${styles.banner}"></div> `;

TypeScript: Fix comment in empty type literal (#​18364 by @​fisker)

// Input
export type XXX = {
  // tbd
};

// Prettier 3.7.1
export type XXX = { // tbd };

// Prettier 3.7.2
export type XXX = {
  // tbd
};

v3.7.1

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API: Fix performance regression in doc printer (#​18342 by @​fisker)

Prettier 3.7.0 can be very slow when formatting big files, the regression has been fixed.

v3.7.0

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🔗 Release Notes

v3.6.2

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Markdown: Add missing blank line around code block (#​17675 by @​fisker)

<!-- Input -->
1. Some text, and code block below, with newline after code block

   ```yaml
   ---
   foo: bar
   ```

   1. Another
   2. List

<!-- Prettier 3.6.1 -->
1. Some text, and code block below, with newline after code block

   ```yaml
   ---
   foo: bar
   ```
   1. Another
   2. List

<!-- Prettier 3.6.2 -->
1. Some text, and code block below, with newline after code block

   ```yaml
   ---
   foo: bar
   ```

   1. Another
   2. List

v3.6.1

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TypeScript: Allow const without initializer (#​17650, #​17654 by @​fisker)

// Input
export const version: string;

// Prettier 3.6.0 (--parser=babel-ts)
SyntaxError: Unexpected token (1:21)
> 1 | export const version: string;
    |                     ^

// Prettier 3.6.0 (--parser=oxc-ts)
SyntaxError: Missing initializer in const declaration (1:14)
> 1 | export const version: string;
    |              ^^^^^^^^^^^^^^^

// Prettier 3.6.1
export const version: string;

Miscellaneous: Avoid closing files multiple times (#​17665 by @​43081j)

When reading a file to infer the interpreter from a shebang, we use the
n-readlines library to read the first line in order to get the shebang.

This library closes files when it reaches EOF, and we later try close the same
files again. We now close files only if n-readlines did not already close
them.

v3.6.0

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🔗 Release Notes

v3.5.3

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Flow: Fix missing parentheses in ConditionalTypeAnnotation (#​17196 by @​fisker)

// Input
type T<U> = 'a' | ('b' extends U ? 'c' : empty);
type T<U> = 'a' & ('b' extends U ? 'c' : empty);

// Prettier 3.5.2
type T<U> = "a" | "b" extends U ? "c" : empty;
type T<U> = "a" & "b" extends U ? "c" : empty;

// Prettier 3.5.3
type T<U> = "a" | ("b" extends U ? "c" : empty);
type T<U> = "a" & ("b" extends U ? "c" : empty);

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