tweak the wording a bit more.

theory/paper_pasc/pasc_paper.tex

@@ -343,11 +343,11 @@ Intel's TBB \cite{ref:Reinders2007}, and, to some extent,
 Charm++ \cite{ref:Kale1993}.
 
 Since none of these existing taks-based libraries provide the flexibility
-required to make experiment with different scheduling and communication
+required to experiment with different scheduling and communication
 techniques, we chose to implement our own task scheduler
 in \swift, which has since been back-ported as the general-purpose
 \qs task scheduler \cite{gonnet2013quicksched}.
-This also allowed us to extend the scheduler with the concept of
+This allowed us to extend the scheduler with the concept of
 task conflicts and integrate the asynchronous communication
 scheme described further on.