BUGFIX: Fusion parser fix multi line comment

[mhsdesign]

This fixes a bug where the Fusion parser would not parse following c-style comments correctly:

/**
comment with multiple stars even
**/

This happed when the ending count of * was even. So ending a comment with ***/ worked previously.

Now we use the "correct" regex from Jeffrey E.F. Friedl's book "Mastering Regular Expressions" Page 272 "Unrolling C Comments"
We already use his regex for string matching and it is really fast due to the unrolled loop. Faster than using the lazy quantifier ~^/\*.*?\*/~s.

I did a performance test with 1 million iteration on three different comment samples (with each sample having a dynamic part to clear possible caches):

Unrolled (this pr)	Simple Lazy Quantifier
0.143725s	0.160235s
0.181047s	0.203759s
0.156254s	0.170144s

Additionally the error message for comments starting with /** was improved. Previously $nextLine->char(1) would return ** instead of just one * because wrongly implemented.

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Checklist

• Code follows the PSR-2 coding style
• Tests have been created, run and adjusted as needed
• The PR is created against the lowest maintained branch
• Reviewer - PR Title is brief but complete and starts with FEATURE|TASK|BUGFIX
• Reviewer - The first section explains the change briefly for change-logs
• Reviewer - Breaking Changes are marked with !!! and have upgrade-instructions

[markusguenther]

I can approve that it runs and does what is in the description. As I am not the fusion parser expert, I don't know if it is the best solution.