Newlines in Auto Completion is not working in later Versions

[mhummels]

Type: LanguageService

Describe the bug

• OS and Version: Ubuntu 20.04
• VS Code Version: 1.52.1
• C/C++ Extension Version: 0.29.0 up to 1.2.0
• Other extensions you installed (and if the issue persists after disabling them): disabled all for testing, problem persists
• Does this issue involve using SSH remote to run the extension on a remote machine?: no

In Issue #2937 the problem with multiple lines in the code preview was fixed with version 0.23.0. In my current setup it does not work, so I tried downgrading to 0.23.0 and tada it worked. Then I upgraded versionwise to 0.29.0 where it stopped working. So it seems like every version 0.29.0 and above do have the same Issue again.

Steps to reproduce

1. Install current Version of cpptools
2. Write Function with Doxygenconform header over multiple lines. For example:

/**
 * @brief test function
 * 
 * Some
 * 
 * Test
 */
int test()
{
    return 0;
}

int main() {
    test();
}

3. Open the Preview of test():
   
4. All comment lines are on one line

Expected behavior
On cpptools Version 0.28.3 it looks as expected:

With exception of the missing parsing of the doxygen commands.

[sean-mcmanus]

@michelleangela Do you know about this? It repros with VS too and with simplifyStructuredComments set to true or false.

[michelleangela]

This a duplicate of #5741 and #5903