Fix typos in list.fsi (#15104)

Co-authored-by: Tomas Grosup <[email protected]>

Author: kbiondi

src/FSharp.Core/list.fsi

@@ -819,7 +819,7 @@ module List =
     ///     match (input1, input2) with
     ///     | Head, Head -> acc + 1
     ///     | Tails, Tails -> acc + 1
-    ///     | _ -> acc - 1)
+    ///     | _ -> acc)
     /// </code>
     /// Evaluates to <c>1</c>. Note <c>acc</c> is a commonly used abbreviation for "accumulator".
     /// </example>
@@ -1208,7 +1208,7 @@ module List =
     /// let inputs1 = [ "a"; "b"; "c" ]
     /// let inputs2 = [ "banana"; "pear"; "apple" ]
     ///
-    /// (inputs1, inputs2) ||> List.iteri2 (fun i s1 s2 -> printfn "Index {i}: {s1} - {s2}")
+    /// (inputs1, inputs2) ||> List.iteri2 (fun i s1 s2 -> printfn "Index %d: %s - %s" i s1 s2)
     /// </code>
     /// Evaluates to <c>unit</c> and prints
     /// <code lang="fsharp">
@@ -1360,8 +1360,8 @@ module List =
     ///
     /// <returns>The list of transformed elements, and the final accumulated value.</returns>
     ///
-    /// <example id="mapfold-1">
-    /// <code lang="fsharp">Accumulate the charges, and double them as well
+    /// <example id="mapfold-1">Accumulate the charges, and double them as well
+    /// <code lang="fsharp">
     /// type Charge =
     ///     | In of int
     ///     | Out of int
@@ -2584,7 +2584,7 @@ module List =
     /// let names = ["one"; "two"]
     /// let roman = ["I"; "II"]
     ///
-    /// Array.zip3 numbers names roman
+    /// List.zip3 numbers names roman
     /// </code>
     /// Evaluates to <c>[(1, "one", "I"); (2, "two", "II")]</c>.
     /// </example>