Improve translation-readiness of string with subclause

Author: MichaelChirico

src/froll.c

@@ -1625,7 +1625,8 @@ void frollmedianFast(const double *x, uint64_t nx, ans_t *ans, int k, double fil
     setlinks(&o[j*k], &next[j*(k+1)], &prev[j*(k+1)], tail);
   }
   if (verbose)
-    snprintf(end(ans->message[0]), 500, _("%s: finding order and initializing links for %d blocks %stook %.3fs\n"), "frollmedianFast", b, par ? "in parallel " : "", omp_get_wtime()-tic);
+    snprintf(end(ans->message[0]), 500, par ? _("%s: finding order and initializing links for %d blocks in parallel took %.3fs\n")
+                                            : _("%s: finding order and initializing links for %d blocks in serial took %.3fs\n"), "frollmedianFast", b, omp_get_wtime()-tic);
   // fill leading partial window
   for (int i=0; i<k-1; i++) {
     ansv[i] = fill;