Fixup: trailing space in line

Author: jensmaurer

source/algorithms.tex

@@ -426,7 +426,7 @@
 Thus, the synchronization with \tcode{execution::unsequenced_policy}
 is restricted as follows:
 vectorization-unsafe standard library functions may not be invoked
-by user code called from \tcode{execution::unsequenced_policy} algorithms. 
+by user code called from \tcode{execution::unsequenced_policy} algorithms.
 
 \pnum
 The invocations of element access functions in parallel algorithms invoked with