lib: fix stream as context is redundant
Using the variable name in the comment and justifying the type seems redundant to me and instead it should defined the entity which it is acting, like in our case it is acting as a flag to control the flow in streams.
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines