diff --git a/exec/make_command_o2.py b/exec/make_command_o2.py
index 29db764e..6f8fe0d0 100644
--- a/exec/make_command_o2.py
+++ b/exec/make_command_o2.py
@@ -174,10 +174,12 @@ def main():
     if save_tables:
         msg_warn("Tables will be saved in trees.")
     if perf:
-        msg_warn("Performance profiling stats will be saved in perf.data files.\n"
-                 "  Convert them with: perf script --demangle -i perf.data --no-inline |"
-                 " c++filt -r -t  > profile.linux-perf.txt\n"
-                 "  and upload the output to https://www.speedscope.app/.")
+        msg_warn(
+            "Performance profiling stats will be saved in perf.data files.\n"
+            "  Convert them with: perf script --demangle -i perf.data --no-inline |"
+            " c++filt -r -t  > profile.linux-perf.txt\n"
+            "  and upload the output to https://www.speedscope.app/."
+        )
 
     # Get workflow-independent options.
     dic_opt = dic_in["options"]