Secondary heredoc eating wrong lines.

If multiple heredoc are expressed on the same statement line, lines are taken from the next line, not after lines read by other heredoc.

print(<<EOD1); print(<<EOD2);
This is line 1.
This is line 2.
EOD1
This is line 3.
This is line 4.
EOD2

Expected:

This is line 1.
This is line 2.
This is line 3.
This is line 4.

Actual:

This is line 1.
This is line 2.
This is line 1.
This is line 2.
EOD1
This is line 3.
This is line 4.