[MINOR][DOCS] Add missing part of RDD mapPartitions* docstrings #44726
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What changes were proposed in this pull request?
The original docstring is here:
spark/core/src/main/scala/org/apache/spark/rdd/RDD.scala
Lines 847 to 848 in 5db7beb
This docstring was copied incompletely to various RDD methods in the PySpark API.
Why are the changes needed?
So the docstring is complete and coherent.
Does this PR introduce any user-facing change?
Yes, it changes the public API docstring.
How was this patch tested?
Not tested.
Was this patch authored or co-authored using generative AI tooling?
No.