semantics: slightly clarify big-O claim

Clarification by more precise specification.

diff --git a/RELEASES.md b/RELEASES.md
index c9064d924097c1092d3b7171ab6d68cbb2b0412c..4b404259480b5ee24fb238a65e3b301ee4caa32a 100644 (file)
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -140,7 +140,7 @@ Cargo
 Performance
 -----------
 
-* [The complexity of comparing variables for equivalence during type 
+* [The time complexity of comparing variables for equivalence during type 
   unification is reduced from _O_(_n_!) to _O_(_n_)][1.9tu]. This leads
   to major compilation time improvement in some scenarios.
 * [`ToString` is specialized for `str`, giving it the same performance