FIXED: Catastrophic backtracking in regular expression if the current…

[hernst42]

… text pattern contains lot of white spaces
I got the following error with one of my Doc-Blocks:
Backtrack limit was exhausted (pattern: #\+\-\-\-\-\+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\s+\+\=\=\=\=\+#s)". On line: 2

Example Doc-Block which caused an issue:

   /**
     * format:
     *      current matrix:               layout:
     *      +----+                        +====+
     *      |    |                        X    X
     *      +    +                        +    +
     *      |    |                        X    X
     *      +    +                        +====+
     *      |    |                        X    X
     *      +    +                        +    +
     *      |    |                        X    X
     *      +----+                        +====+
     *
     * @return TableLayout
     */ 

The attached change should have the same pattern matching semantic.

[TomasVotruba]

Thank you 👍