Fess does not accept pruned tag with a hyphen in the class name.
If I try to use pruned tag span.sr-only it is rejected:
org.codelibs.fess.exception.FessSystemException: Invalid pruned tag: span.sr-only
at org.codelibs.fess.mylasta.direction.FessProp.lambda$getCrawlerDocumentHtmlPrunedTagsAsArray$21(FessProp.java:782) ~[classes/:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) ~[?:?]
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) ~[?:?]
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:550) ~[?:?]
at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]
at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:517) ~[?:?]
at org.codelibs.fess.mylasta.direction.FessProp.lambda$getCrawlerDocumentHtmlPrunedTagsAsArray$23(FessProp.java:783) ~[classes/:?]
at org.codelibs.core.stream.StreamUtil$StreamOf.get(StreamUtil.java:60) ~[corelib-0.5.4.jar:?]
at org.codelibs.fess.mylasta.direction.FessProp.getCrawlerDocumentHtmlPrunedTagsAsArray(FessProp.java:762) ~[classes/:?]
at org.codelibs.fess.crawler.transformer.FessXpathTransformer.isPrunedTag(FessXpathTransformer.java:678) ~[classes/:?]
at org.codelibs.fess.crawler.transformer.FessXpathTransformer.pruneNode(FessXpathTransformer.java:659) ~[classes/:?]
at org.codelibs.fess.crawler.transformer.FessXpathTransformer.storeData(FessXpathTransformer.java:179) ~[classes/:?]
at org.codelibs.fess.crawler.transformer.impl.HtmlTransformer.transform(HtmlTransformer.java:117) ~[fess-crawler-3.11.1.jar:?]
at org.codelibs.fess.crawler.processor.impl.DefaultResponseProcessor.process(DefaultResponseProcessor.java:74) ~[fess-crawler-3.11.1.jar:?]
at org.codelibs.fess.crawler.CrawlerThread.processResponse(CrawlerThread.java:287) [fess-crawler-3.11.1.jar:?]
at org.codelibs.fess.crawler.FessCrawlerThread.processResponse(FessCrawlerThread.java:236) ~[classes/:?]
at org.codelibs.fess.crawler.CrawlerThread.run(CrawlerThread.java:162) [fess-crawler-3.11.1.jar:?]
at java.lang.Thread.run(Thread.java:834) [?:?]