add a `Display` implementation to `Expression` HEAD canon

this change adds a string formatter for `Expression`s using the `Display`
trait. additionally, it standardizes the way `Display` implementations
are written and makes some minor adjustments to the parameters used for
the proptest-based test for `Expression`.

Change-Id: I6a6a6964cd5c04e95341a499dcd73297ca2f514a

1 files changed, 3 insertions, 3 deletions

diff --git a/crates/core/src/hive/mod.rs b/crates/core/src/hive/mod.rs
index ad14725..3f83099 100644
--- a/crates/core/src/hive/mod.rs
+++ b/crates/core/src/hive/mod.rs
@@ -297,8 +297,8 @@ pub enum Error {
 
 #[cfg(feature = "core-fmt")]
 impl fmt::Display for Error {
-    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
-        fmt.write_str("memory allocation failed")?;
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str("memory allocation failed")?;
         let reason = match self {
             Error::CapacityOverflow => {
                 " because the computed capacity exceeded the hive's maximum"
@@ -307,7 +307,7 @@ impl fmt::Display for Error {
                 " because the memory allocator returned an error"
             }
         };
-        fmt.write_str(reason)
+        f.write_str(reason)
     }
 }