remove trailing space

Author: lmiq

docs/src/multithreading.md

@@ -25,7 +25,6 @@ true
 julia> using BenchmarkTools
 
 julia> @btime sum(x -> log(x)^7, $x);
-
   938.583 μs (0 allocations: 0 bytes)
 
 julia> @btime parallel_sum(x -> log(x)^7, $x; n=Threads.nthreads());
@@ -255,4 +254,4 @@ julia> @btime parallel_sum_atthreads($f_nonuniform, $xs; n=nthreads(), split=Con
 
 julia> @btime parallel_sum_atthreads($f_nonuniform, $xs; n=nthreads(), split=RoundRobin());
   567.175 ms (35 allocations: 3.53 KiB)
-```
+```