Description:
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If a perfectly valid heredoc is not followed by an additional character, the reported error states that an end label was expected, even though it was present. 

This means that instead of removing the requirement for a trailing newline, it was in fact replaced by a requirement for any trailing character.

Test script:
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// No trailing line.
echo <<<LABEL
  hello world
  LABEL

Expected result:
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Parse error: syntax error, unexpected end of file, expecting ',' or ';'

Actual result:
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Parse error: syntax error, unexpected end of file, expecting variable (T_VARIABLE) or heredoc end (T_END_HEREDOC) or ${ (T_DOLLAR_OPEN_CURLY_BRACES) or {$ (T_CURLY_OPEN)