remove trailing whitespace

Author: coke

doc/Type/Iterable.pod6

@@ -95,7 +95,7 @@ C<race> method. Note that in some cases, choosing a degree higher than the avail
 can make sense, for example I/O bound work or latency-heavy tasks like web crawling. For
 CPU-bound work, however, it makes no sense to pick a number higher than the CPU core count.
 
-The C<batch> size option configures the number of items sent to a given parallel worker at once. 
+The C<batch> size option configures the number of items sent to a given parallel worker at once.
 It allows for making a throughput/latency trade-off. If, for example, an operation is long-running
 per item, and you need the first results as soon as possible, set it to 1. That means every
 parallel worker gets 1 item to process at a time, and reports the result as soon as possible.