diff --git a/src/main.rs b/src/main.rs
index d89d10f95..deffe7bfd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -200,13 +200,13 @@ fn main() {
                 }
             }))
         .after_help("Optimization levels:
-    -o 0          => --zc 3 --nz                  (0 or 1 trials)
-    -o 1          => --zc 9                       (1 trial, determined heuristically)
-    -o 2          => --zc 9 --zs 0-3 -f 0,5       (8 trials)
-    -o 3          => --zc 9 --zs 0-3 -f 0-5       (24 trials)
-    -o 4          => --zc 9 --zs 0-3 -f 0-5 -a    (24 trials + 6 alpha trials)
-    -o 5          => --zc 3-9 --zs 0-3 -f 0-5 -a  (96 trials + 6 alpha trials)
-    -o 6          => --zc 1-9 --zs 0-3 -f 0-5 -a  (180 trials + 6 alpha trials)
+    -o 0  =>  --zc 3 --nz                  (0 or 1 trials)
+    -o 1  =>  --zc 9                       (1 trial, determined heuristically)
+    -o 2  =>  --zc 9 --zs 0-3 -f 0,5       (8 trials)
+    -o 3  =>  --zc 9 --zs 0-3 -f 0-5       (24 trials)
+    -o 4  =>  --zc 9 --zs 0-3 -f 0-5 -a    (24 trials + 6 alpha trials)
+    -o 5  =>  --zc 3-9 --zs 0-3 -f 0-5 -a  (96 trials + 6 alpha trials)
+    -o 6  =>  --zc 1-9 --zs 0-3 -f 0-5 -a  (180 trials + 6 alpha trials)
 
     Manually specifying a compression option (zc, zs, etc.) will override the optimization preset,
     regardless of the order you write the arguments.")