tweak 90% histogram display

- also show bar
- fix padding

squiggle_more.c

@@ -364,7 +364,7 @@ void array_print_90_ci_histogram(double* xs, int n_samples, int n_bins)
             max_bin_count = bins[i];
         }
     }
-    const int MAX_WIDTH = 50; // Adjust this to your terminal width
+    const int MAX_WIDTH = 40; // Adjust this to your terminal width
     double scale = max_bin_count > MAX_WIDTH ? (double)MAX_WIDTH / max_bin_count : 1.0;
 
     // Print the histogram
@@ -374,7 +374,12 @@ void array_print_90_ci_histogram(double* xs, int n_samples, int n_bins)
         decimalPlaces = -magnitude;
         decimalPlaces = decimalPlaces > 10 ? 10 : decimalPlaces;
     }
-    printf("(-∞, %*.*f):  %d\n", 4 + decimalPlaces, decimalPlaces, min_value, below_min);
+    printf("(%*s, %*.*f): ", 6 + decimalPlaces, "-∞", 4 + decimalPlaces, decimalPlaces, min_value);
+    int marks_below_min = (int)(below_min * scale);
+    for (int j = 0; j < marks_below_min; j++) {
+        printf("█");
+    }
+    printf(" %d\n", below_min);
     for (int i = 0; i < n_bins; i++) {
         double bin_start = min_value + i * bin_width;
         double bin_end = bin_start + bin_width;
@@ -392,7 +397,12 @@ void array_print_90_ci_histogram(double* xs, int n_samples, int n_bins)
         }
         printf(" %d\n", bins[i]);
     }
-    printf("(%*.*f, +∞):  %d\n", 4 + decimalPlaces, decimalPlaces, max_value, above_max);
+    printf("(%*.*f, %*s): ", 4 + decimalPlaces, decimalPlaces, min_value, 6 + decimalPlaces, "+∞");
+    int marks_above_max = (int)(above_max * scale);
+    for (int j = 0; j < marks_above_max; j++) {
+        printf("█");
+    }
+    printf(" %d\n", above_max);
 
     // Free the allocated memory for bins
     free(bins);