fix Issue 10519 - Stray-paren in doc-unittest code generates wrong document
fix Issue 7656 - ddoc misinterprets commented parentheses in an example
fix Issue 7715 - DDoc eats $1, $2, $3 etc. inside d_code section
Merge pull request #2287 from 9rnsr/fix10519

Issue 10519 - Stray-paren in doc-unittest code generates wrong document