more documentation improvements; fixes #9119

doc/backends.rst

@@ -135,7 +135,7 @@ them along the Nim code is easier than using a system library. Libraries
 installed on the host system can be linked in with the `PassL pragma
 <nimc.html#passl-pragma>`_.
 
-To wrap native code, take a look at the `c2nim tool <c2nim.html>`_ which helps
+To wrap native code, take a look at the `c2nim tool <https://nim-lang.org/docs/c2nim.html>`_ which helps
 with the process of scanning and transforming header files into a Nim
 interface.
 

doc/manual.rst

@@ -7344,7 +7344,7 @@ prefixes ``/*TYPESECTION*/`` or ``/*VARSECTION*/`` or ``/*INCLUDESECTION*/``:
 ImportCpp pragma
 ----------------
 
-**Note**: `c2nim <c2nim.html>`_ can parse a large subset of C++ and knows
+**Note**: `c2nim <https://nim-lang.org/docs/c2nim.html>`_ can parse a large subset of C++ and knows
 about the ``importcpp`` pragma pattern language. It is not necessary
 to know all the details described here.
 

doc/tools.rst

@@ -13,7 +13,7 @@ The standard distribution ships with the following tools:
     and obtain useful information like definition of symbols or suggestions for
     completion.
 
-- | `C2nim <c2nim.html>`_
+- | `C2nim <https://nim-lang.org/docs/c2nim.html>`_
   | C to Nim source converter. Translates C header files to Nim.
 
 - | `nimgrep <nimgrep.html>`_