New types for Gulp-html-prettify (#35005)

* clear to tests

* clear to tests

types/gulp-html-prettify/gulp-html-prettify-tests.ts

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+import * as gulp from 'gulp';
+import prettifyHtml = require('gulp-html-prettify');
+
+gulp.task('prettifyHtml', () => {
+    gulp.src('source/*.html')
+        .pipe(prettifyHtml({
+            indent_char: ' ',
+            indent_size: 2
+        }))
+        .pipe(gulp.dest('./dist/'));
+});

types/gulp-html-prettify/index.d.ts

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+// Type definitions for npm i gulp-html-prettify 0.0
+// Project: https://www.npmjs.com/package/gulp-html-prettify
+// Definitions by: Takesi Tokugawa <https://github.com/TokugawaTakesi>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node"/>
+
+interface GulpHtmlPrettifyOptions {
+    indent_char?: string;
+    indent_size?: number;
+}
+
+interface GulpHtmlPrettify {
+    (options?: GulpHtmlPrettifyOptions): NodeJS.ReadWriteStream;
+}
+
+declare var gulpHtmlPrettify: GulpHtmlPrettify;
+export = gulpHtmlPrettify;

types/gulp-html-prettify/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "esModuleInterop": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "gulp-html-prettify-tests.ts"
+    ]
+}

types/gulp-html-prettify/tslint.json

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+{
+    "extends": "dtslint/dt.json"
+}