Invalid character substitution of string with \x85 (\u0085)

[erny]

When expanding a template with strings that contain \x85, a new line character is inserted. En case of JavaScript, this results in errores.

How to reproduce:

>>> import jinja2
>>> jinja2.Template('Hello\x85World').render()
'hello\nWorld'

Expected:

'hello\x85World'

Environment:

• Python version: 3.8.5
• Jinja version: 2.11.2

[erny]

It seems that the the minified JS includes a polyfill for String.trim, String.trimStart, String.trimEnd which includes the string: \u200b\u0085\u180e (./internals/string-trim-forced.js), so:

  >>> jinja2.Template('\u200b\u0085\u180e').render()
  '\u200b\n\u180e'

This will produce invalid JS.

[davidism]

Duplicate of #769