When SQL update scripts splitted to transactions, commented lines are not ignored

[VitaliiEv]

• Platform version: 7.2.19
  As it's stated in documentation, transactions are separated with "^"
  Sometimes CUBA Platform generates scripts, which contains commented out SQL statements.
  Commented lines are not ignored when it comes to splitting update scripts to transactions.
  A real life example shown below caused that only third line of script was rolled back.

• Minimal reproducible example:
  Create update script with commented out lines:

1. alter table A add column B bigint;
2. -- commented out line^
3. alter table A add column C bigint not null;

• Expected behaviour
  all statements are executed in one transaction line 2 ignored

• Actual behaviour
  statements are executed in two transactions