Fix FixedString::from_static_trunc panic

src/string.rs

@@ -58,7 +58,7 @@ impl<LenT: ValidLength> FixedString<LenT> {
     /// See [`Self::from_string_trunc`] for truncation behaviour.
     pub fn from_static_trunc(val: &'static str) -> Self {
         Self(FixedStringRepr::Static(StaticStr::from_static_str(
-            &val[..LenT::MAX.to_usize()],
+            &val[..val.len().max(LenT::MAX.to_usize())],
         )))
     }