Comment from stylesheet: No special handling was done for the <source> elements. Note the long right-left scrollbar.
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LongLineWithoutWordBoundariesLongLineWithoutWordBoundariesLongLineWithoutWordBoundariesLongLineWithoutWordBoundariesLongLineWithoutWordBoundariesLongLineWithoutWordBoundariesLongLineWithoutWordBoundaries
Try this long URL (it is a real one from cocoon-2.1) ...
http://cocoon.apache.org/2.1/apidocs/org/apache/cocoon/transformation/helpers/ModifiableSourceIncludeCacheStorageProxy.html#hashCode()