https://teiid.gitbooks.io/documents/content/client-dev/OData4_Support.html

Many of the sample URLs in documentation use '+' instead of space (or proper percent-encoding of space, but it is not very readable).
E.g. http://localhost:8080/odata/northwind/NW/customers?$filter=name+eq+'bob'

Please, update sample URLs in the documentation.

I would suggest to use spaces instead of '%20' and add a note, that URL must be properly percent-escaped.