Fix notation; both -n and -N are permitted

README.md

@@ -187,7 +187,7 @@ This process should take around 1–2 hours and requires 20 GB of free disk spac
 - Time: 1 human-minute + 5–20 compute-minutes
 
 ```bash
-./scripts/generate-lox-results.sh [-n NUM_PERFORMANCE_CORES|-N PERFORMANCE_CORE_RANGE] && \
+./scripts/generate-lox-results.sh [-n NUM_PERFORMANCE_CORES] [-N PERFORMANCE_CORE_RANGE] && \
 ./scripts/process-lox-results.sh
 ```