Update README.md

Simplify the Range Adaptor section and refer to the documentation page that discusses it.

README.md

@@ -22,7 +22,7 @@ C++ 17 [deprecated the standard library's `<codecvt>` header file](https://www.o
 
 There are broadly three ways to use the icubaby library:
 
-1. C++ 20 Range Adaptor
+1. [C++ 20 Range Adaptor](#c-20-range-adaptor)
 2. An iterator interface
 3. Manually driving the conversion
 
@@ -37,41 +37,7 @@ std::vector<char16_t> out;
 std::ranges::copy(r, std::back_inserter(out));
 ~~~
 
-This code wants to convert a single Unicode code-point 😀 (U+1F600 GRINNING FACE) from UTF-32 to UTF-16.
-As in the previous examples, the `out` vector will contain a two UTF-16 code units 0xD83D and 0xDE00.
-
-#### Disecting this code
-
-1. Define the input range:
-
-    ~~~cpp
-    auto const in = std::array{char32_t{0x1F600}};
-    ~~~
-
-    We express the input as a container with our input text consisting simply of U+1F600 GRINNING FACE expressed in UTF-32.
-
-2. Create a range with a view of our container and pass it to the icubaby `transcode` range adaptor:
-
-    ~~~cpp
-    auto r = in | icubaby::ranges::transcode<char32_t, char16_t>;
-    ~~~
-
-    The first template argument for icubaby::ranges::transcode<> is the encoding of the input text (one of `icubaby::char8`, `char16_t`, `char32_t`), the second argument is the desired encoding of the output text.
-    
-    We now have the range `r` containing the UTF-16 code-units that correspond to the original input text.
-
-3. The final step is to record the values within the range `r`. In C++ 20, this can be achieved with the [std::ranges::copy()](https://en.cppreference.com/w/cpp/algorithm/ranges/copy) algorithm:
-
-    ~~~cpp
-    std::vector<char16_t> out;
-    std::ranges::copy(r, std::back_inserter(out));
-    ~~~
-
-    If you are using the C++ 23 ranges library, you can simplify this even further using [std::ranges::to()](https://en.cppreference.com/w/cpp/ranges/to):
-    
-    ~~~cpp
-    auto const out = r | std::ranges::to<std::vector> ();
-    ~~~
+This code converts a single Unicode code-point 😀 (U+1F600 GRINNING FACE) from UTF-32 to UTF-16 and will copy two UTF-16 code-units (0xD83D and 0xDE00) into the `out` vector. See the [C++20 Range Adaptor documentation](https://paulhuggett.github.io/icubaby/cxx20-range-adaptor.html) for more details.
 
 ### The Iterator Interface