Fixed end of line problem with gulp-html-extract plugin on Windows.

.gitignore

@@ -2,4 +2,5 @@ bower_components*
 node_modules
 bower-*.json
 package-lock.json
+yarn.lock
 coverage

gulpfile.js

@@ -1,16 +1,17 @@
 'use strict';
 
-var gulp = require('gulp');
-var eslint = require('gulp-eslint');
-var htmlExtract = require('gulp-html-extract');
-var stylelint = require('gulp-stylelint');
-var wct = require('web-component-tester').test;
-var find = require('gulp-find');
-var replace = require('gulp-replace');
-var expect = require('gulp-expect-file');
-var grepContents = require('gulp-grep-contents');
-var clip = require('gulp-clip-empty-files');
-var git = require('gulp-git');
+const gulp = require('gulp');
+const eslint = require('gulp-eslint');
+const htmlExtract = require('gulp-html-extract');
+const lec = require('gulp-line-ending-corrector');
+const stylelint = require('gulp-stylelint');
+const wct = require('web-component-tester').test;
+const find = require('gulp-find');
+const replace = require('gulp-replace');
+const expect = require('gulp-expect-file');
+const grepContents = require('gulp-grep-contents');
+const clip = require('gulp-clip-empty-files');
+const git = require('gulp-git');
 
 gulp.task('lint', ['lint:js', 'lint:html', 'lint:css']);
 
@@ -35,6 +36,7 @@ gulp.task('lint:html', function() {
       sel: 'script, code-example code',
       strip: true
     }))
+    .pipe(lec())
     .pipe(eslint())
     .pipe(eslint.format())
     .pipe(eslint.failAfterError());

package.json

@@ -31,6 +31,7 @@
     "gulp-git": "^2.4.2",
     "gulp-grep-contents": "0.0.1",
     "gulp-html-extract": "^0.3.0",
+    "gulp-line-ending-corrector": "^1.0.2",
     "gulp-replace": "^0.6.1",
     "gulp-stylelint": "^7.0.0",
     "stylelint": "^9.0.0",