rustdoc: don't ignore path distance for doc aliases #147701
   Open  
     +60   −2      
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Ran into a bit of an issue due to the overloading of space (it needs to be a metachar for most searches, but not for doc aliases that have space in them). Not sure if I need to also need to account for other whitespace chars.
fixes #146214
r? @GuillaumeGomez