With the new grammar and queries, open any help file (say, :h api.txt) and look at option or tag links: the concealed markers will include all adjacent whitespace. E.g.,

API Usage                                               *api-rpc* *RPC* *rpc*

becomes

API Usageapi-rpcRPCrpc

instead of

API Usage                                               api-rpc RPC rpc

(This was not the case with the old parser version.)