some doc updates and some more testing

std/array.d

@@ -1923,6 +1923,13 @@ if (isDynamicArray!(E[]) && isForwardRange!R1 && isForwardRange!R2
     return app.data;
 }
 
+/// Ditto
+unittest
+{
+    assert("Hello Wörld".replace("o Wö", "o Wo") == "Hello World");
+    assert("Hello Wörld".replace("l", "h") == "Hehho Wörhd");
+}
+
 /++
     Same as above, but outputs the result via OutputRange $(D sink).
     If no match is found the original array is transferred to $(D sink) as is.
@@ -1957,21 +1964,24 @@ unittest
 
     foreach (S; TypeTuple!(string, wstring, dstring, char[], wchar[], dchar[]))
     {
-        auto s = to!S("This is a foo foo list");
-        auto from = to!S("foo");
-        auto into = to!S("silly");
-        S r;
-        int i;
+        foreach (T; TypeTuple!(string, wstring, dstring, char[], wchar[], dchar[]))
+        {
+            auto s = to!S("This is a foo foo list");
+            auto from = to!T("foo");
+            auto into = to!S("silly");
+            S r;
+            int i;
 
-        r = replace(s, from, into);
-        i = cmp(r, "This is a silly silly list");
-        assert(i == 0);
+            r = replace(s, from, into);
+            i = cmp(r, "This is a silly silly list");
+            assert(i == 0);
 
-        r = replace(s, to!S(""), into);
-        i = cmp(r, "This is a foo foo list");
-        assert(i == 0);
+            r = replace(s, to!S(""), into);
+            i = cmp(r, "This is a foo foo list");
+            assert(i == 0);
 
-        assert(replace(r, to!S("won't find this"), to!S("whatever")) is r);
+            assert(replace(r, to!S("won't find this"), to!S("whatever")) is r);
+        }
     }
 
     immutable s = "This is a foo foo list";
@@ -2001,14 +2011,6 @@ unittest
     Replaces elements from $(D array) with indices ranging from $(D from)
     (inclusive) to $(D to) (exclusive) with the range $(D stuff). Returns a new
     array without changing the contents of $(D subject).
-
-    Examples:
-    --------------------
-    auto a = [ 1, 2, 3, 4 ];
-    auto b = a.replace(1, 3, [ 9, 9, 9 ]);
-    assert(a == [ 1, 2, 3, 4 ]);
-    assert(b == [ 1, 9, 9, 9, 4 ]);
-    --------------------
  +/
 T[] replace(T, Range)(T[] subject, size_t from, size_t to, Range stuff)
     if(isInputRange!Range &&
@@ -2038,7 +2040,7 @@ T[] replace(T, Range)(T[] subject, size_t from, size_t to, Range stuff)
     }
 }
 
-//Verify Examples.
+/// Ditto
 unittest
 {
     auto a = [ 1, 2, 3, 4 ];