From: Simon Tatham <anakin@pobox.com>
Date: Sat, 12 Apr 2025 12:19:05 +0000 (+0100)
Subject: Handle the 'alternate' formatting flag.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=dfca08a29c0dd935ce7aa708b72e3e11045ba833;p=nimber.git

Handle the 'alternate' formatting flag.

Suppresses the optimisation of omitting the 0x on single-decimal-digit
nimbers.
---

diff --git a/src/finitenimber.rs b/src/finitenimber.rs
index b7ea0bb..469cd06 100644
--- a/src/finitenimber.rs
+++ b/src/finitenimber.rs
@@ -49,7 +49,10 @@ impl Debug for FiniteNimberRef<'_> {
 
 impl Display for FiniteNimber {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), core::fmt::Error> {
-        if self.to_ref().level() < WORDLEVELS && self.0[0] < 10 {
+        if !f.alternate()
+            && self.to_ref().level() < WORDLEVELS
+            && self.0[0] < 10
+        {
             write!(f, "*{}", self.0[0])
         } else {
             write!(f, "*0x")?;