XML : How to fix XML validation error in eclipse s4s-elt-character non-whitespace are not allowed?

Eclipse throws validation error on this

s4s-elt-character: Non-whitespace characters are not allowed in schema elements other than 'xs:appinfo' and 'xs:documentation'

for the below XML file. Please help me find out the issue. There appears to be none.

  <databaseChangeLog       xmlns="http://www.liquibase.org/xml/ns/dbchangelog"          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"          xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-2.0.xsd">        ...   </databaseChangeLog>