Document --htmlWhitespaceSensitivity option for Handlebars (#10079)
Document --htmlWhitespaceSensitivity option for Handlebars (#10079)

* Document htmlWhitespaceSensitivity for Handlebars

* Update options.md

Co-authored-by: Georgii Dolzhykov <a870eedd174a99ed075aa28024e40feab80c2bbb@gmail.com>
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