general: Clarify relative ordering of modules in docs

modules/syntax-highlighting/README.md

@@ -4,12 +4,17 @@ Integrates [zsh-syntax-highlighting][1] into Prezto.
 
 This module must be loaded _before_ the _`prompt`_ module.
 
+If this module is used in conjunction with the [_`history-substring-search`_][2]
+module, this module must be loaded _before_ the _`history-substring-search`_
+module.
+
 Additionally, if this module is used in conjunction with the
-[_`history-substring-search`_][2] module, this module must be loaded _before_
-the _`history-substring-search`_ module.
+[_`autosuggestions`_][3] module, this module must be loaded _before_ the
+_`autosuggestions`_ module as well.
 
 To elaborate, the relative order of loading the modules would be
-_`syntax-highlighting`_, _`history-substring-search`_ and _`prompt`_.
+_`syntax-highlighting`_, _`history-substring-search`_, _`autosuggestions`_ and
+_`prompt`_.
 
 ## Contributors
 
@@ -30,7 +35,7 @@ zstyle ':prezto:module:syntax-highlighting' color 'yes'
 
 ### Highlighters
 
-Syntax highlighting is accomplished by pluggable [highlighters][3]. This module
+Syntax highlighting is accomplished by pluggable [highlighters][4]. This module
 only enables the _main_ highlighter by default.
 
 To enable all highlighters, add the following to
@@ -62,11 +67,12 @@ zstyle ':prezto:module:syntax-highlighting' styles \
 
 ## Authors
 
-_The authors of this module should be contacted via the [issue tracker][4]._
+_The authors of this module should be contacted via the [issue tracker][5]._
 
 - [Sorin Ionescu](https://github.com/sorin-ionescu)
 
 [1]: https://github.com/zsh-users/zsh-syntax-highlighting
 [2]: ../history-substring-search#readme
-[3]: https://github.com/zsh-users/zsh-syntax-highlighting/tree/master/highlighters
-[4]: https://github.com/sorin-ionescu/prezto/issues
+[3]: ../autosuggestions#readme
+[4]: https://github.com/zsh-users/zsh-syntax-highlighting/tree/master/highlighters
+[5]: https://github.com/sorin-ionescu/prezto/issues