<!--[if !mso]><!-->...<!--<![endif]--> tag issue after exported

[nguyentuansi]

Describe the bug Hi team, I'm facing an issue when export HTML. This function was worked perfectly but it just happened these days.

To Reproduce More details below:

I'm using below code for styling a superscript:

<!--[if !mso]><!-->
          <sup style="font-family: Arial, sans-serif;font-size: 9px;">#</sup>
<!--<![endif]-->
<!--[if mso | IE]>
          <sup style="font-family: Arial, sans-serif;font-size: 9px; line-height: 16px">#</sup>
<![endif]-->

When I exported to HTML it became:

<!--[if !mso]><!-->
          <sup style="font-family: Arial, sans-serif;font-size: 9px;">#</sup>
<!--<sup style="font-family: Arial, sans-serif;font-size: 9px; line-height: 16px">#</sup>
<![endif]-->

MJML environment (please complete the following information):

• OS: Windows
• MJML Version 4.2.0
• MJML tool used : VS Code

Email sending environment(for rendering issues):

• Platform used to send the email Putsmail

Affected email clients (for rendering issues):

• OS: Windows Outlook from 2007

Screenshots From: To:

[iRyusa]

I think the conditionnal comment are merged, together because of permissive regexp,

https://github.com/mjmlio/mjml/blob/master/packages/mjml-core/src/helpers/mergeOutlookConditionnals.js

Try to add a random html comment in between those for now