2.1.6 [W3C-EPUB3] Section 3.4.7. The meta Element

V0010: Leading and trailing whitespace is not trimmed

The specification states:

 › 3.4.7 The meta Element
  
 The meta element provides a generic means of including package metadata, allowing the 
 expression of primary metadata about the package or content and refinement of that 
 metadata.
 ...
 Unless an individual property explicitly defines a different whitespace normalization 
 algorithm, Reading Systems must trim all leading and trailing whitespace from the meta 
 element values, as defined by the XML specification [XML], before further processing them.

EdgeHTML Mode

Leading and trailing whitespace is not trimmed.