Allow writing test queries in multiple lines

[rfdavid]

This PR allows writing queries in multiple lines in the test file. Example:

-QUERY MATCH (n:Person {id: 1129})-[r:Person_knows_Person]-(friend)
       RETURN friend.id AS personId,
              friend.firstName AS firstName,
              friend.lastName AS lastName,
              r.creationDate AS friendshipCreationDate
       ORDER BY friendshipCreationDate DESC, personId ASC
---- 7

Notes:

1. line breaks will be replaced by a single space
2. The next line doesn't need to be necessarily ----. Any valid token will consider the query is finished (ie -CHECK_ORDER)

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (8bbec69) 91.93% compared to head (2509945) 91.93%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1602   +/-   ##
=======================================
  Coverage   91.93%   91.93%           
=======================================
  Files         703      704    +1     
  Lines       25545    25567   +22     
=======================================
+ Hits        23484    23505   +21     
- Misses       2061     2062    +1     

see 28 files with indirect coverage changes

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