Fix stripping non-breaking comments in code when preserving whitespace

Fixes #64

Author: sindresorhus

index.js

@@ -2,7 +2,9 @@ const singleComment = Symbol('singleComment');
 const multiComment = Symbol('multiComment');
 
 const stripWithoutWhitespace = () => '';
-const stripWithWhitespace = (string, start, end) => string.slice(start, end).replace(/\S/g, ' ');
+
+// Replace all characters except ASCII spaces, tabs and line endings with regular spaces to ensure valid JSON output.
+const stripWithWhitespace = (string, start, end) => string.slice(start, end).replace(/[^ \t\r\n]/g, ' ');
 
 const isEscaped = (jsonString, quotePosition) => {
 	let index = quotePosition - 1;

test.js

@@ -78,3 +78,13 @@ test.failing('handles malformed block comments', t => {
 	t.is(stripJsonComments('[] */'), '[] */');
 	t.is(stripJsonComments('[] /*'), '[] /*'); // Fails
 });
+
+test('handles non-breaking space with preserving whitespace', t => {
+	const fixture = `{
+	// Comment with non-breaking-space: '\u00A0'
+	"a": 1
+	}`;
+
+	const stripped = stripJsonComments(fixture);
+	t.deepEqual(JSON.parse(stripped), {a: 1});
+});