Markdown link migration part 2 (#20371)

doc/docs.md

@@ -1,38 +1,38 @@
 The documentation consists of several documents:
 
-- | `Tutorial (part I) <tut1.html>`_
+- | [Tutorial (part I)](tut1.html)
   | The Nim tutorial part one deals with the basics.
 
-- | `Tutorial (part II) <tut2.html>`_
+- | [Tutorial (part II)](tut2.html)
   | The Nim tutorial part two deals with the advanced language constructs.
 
-- | `Tutorial (part III) <tut3.html>`_
+- | [Tutorial (part III)](tut3.html)
   | The Nim tutorial part three about Nim's macro system.
 
-- | `Language Manual <manual.html>`_
+- | [Language Manual](manual.html)
   | The Nim manual is a draft that will evolve into a proper specification.
 
-- | `Library documentation <lib.html>`_
+- | [Library documentation](lib.html)
   | This document describes Nim's standard library.
 
-- | `Compiler user guide <nimc.html>`_
+- | [Compiler user guide](nimc.html)
   | The user guide lists command line arguments, special features of the
     compiler, etc.
 
-- | `Tools documentation <tools.html>`_
+- | [Tools documentation](tools.html)
   | Description of some tools that come with the standard distribution.
 
-- | `Memory management <mm.html>`_
+- | [Memory management](mm.html)
   | Additional documentation about Nim's memory management strategies
   | and how to operate them in a realtime setting.
 
-- | `Source code filters <filters.html>`_
+- | [Source code filters](filters.html)
   | The Nim compiler supports source code filters as a simple yet powerful
     builtin templating system.
 
-- | `Internal documentation <intern.html>`_
+- | [Internal documentation](intern.html)
   | The internal documentation describes how the compiler is implemented. Read
     this if you want to hack the compiler.
 
-- | `Index <theindex.html>`_
+- | [Index](theindex.html)
   | The generated index. **Index + (Ctrl+F) == Joy**