fix(parser): preproc operator mixed with line cont

[gnikit]

The logical operator && present in the preprocessor expressions interfered with the line continuation operator & thus resulting into invalid syntax

Fixed #398

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.14%. Comparing base (a5fc5ed) to head (306e11d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #399 +/- ## ========================================== + Coverage 87.99% 88.14% +0.15% ========================================== Files 35 35 Lines 4788 4790 +2 ========================================== + Hits 4213 4222 +9 + Misses 575 568 -7 ```

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