Merge pull request #7158 from sternenseemann/foldl-strict-accumulation-value

src/libexpr/primops.cc

@@ -3032,9 +3032,9 @@ static RegisterPrimOp primop_foldlStrict({
     .doc = R"(
       Reduce a list by applying a binary operator, from left to right,
       e.g. `foldl' op nul [x0 x1 x2 ...] = op (op (op nul x0) x1) x2)
-      ...`. The operator is applied strictly, i.e., its arguments are
-      evaluated first. For example, `foldl' (x: y: x + y) 0 [1 2 3]`
-      evaluates to 6.
+      ...`. For example, `foldl' (x: y: x + y) 0 [1 2 3]` evaluates to 6.
+      The return value of each application of `op` is evaluated immediately,
+      even for intermediate values.
     )",
     .fun = prim_foldlStrict,
 });