Merge pull request #7381 from aakropotkin/doc-ltoa-conflicts

doc: listToAttrs: document repeated keys

src/libexpr/primops.cc

@@ -2420,12 +2420,18 @@ static RegisterPrimOp primop_listToAttrs({
       Construct a set from a list specifying the names and values of each
       attribute. Each element of the list should be a set consisting of a
       string-valued attribute `name` specifying the name of the attribute,
-      and an attribute `value` specifying its value. Example:
+      and an attribute `value` specifying its value.
+
+      In case of duplicate occurrences of the same name, the first
+      takes precedence.
+
+      Example:
 
       ```nix
       builtins.listToAttrs
         [ { name = "foo"; value = 123; }
           { name = "bar"; value = 456; }
+          { name = "bar"; value = 420; }
         ]
       ```