Trains should be left associative and hooks should be right associative

1 files changed, 2 insertions, 2 deletions

diff --git a/rprt-engine/src/expression.rs b/rprt-engine/src/expression.rs
index fcb1ff1..3bad172 100644
--- a/rprt-engine/src/expression.rs
+++ b/rprt-engine/src/expression.rs
@@ -59,14 +59,14 @@ impl Display for Composite {
             Train2 { f, g } => write!(fmtr, "({f} {g})"),
             Train3 { f, g, h } => write!(fmtr, "({f} {g} {h})"),
             Group { operations } => {
-                write!(fmtr, "{{")?;
+                write!(fmtr, "{{ ")?;
                 for (i, op) in operations.iter().enumerate() {
                     if i > 0 {
                         write!(fmtr, " , ")?;
                     }
                     write!(fmtr, "{}", op)?;
                 }
-                write!(fmtr, "}}")
+                write!(fmtr, " }}")
             }
         }
     }