general: Reformat documentation with better formatting and wording

General purpose reformating and rewording in (a few places). This should
also make markdown linting happier.

Prefer back-ticks wherever useful and use `console` for code blocks to
be executed on terminal.

Also, update references links wherever possible (including update from
'http://' to 'https://').

modules/rsync/README.md

@@ -1,26 +1,23 @@
-Rsync
-=====
+# Rsync
 
 Defines [rsync][1] aliases.
 
 macOS users are encouraged to use *rsync* from [Homebrew][2] or [MacPorts][3],
 which has additional enhancements including patches from [Bombich][4].
 
-Aliases
--------
+## Aliases
 
-  - `rsync-copy` copies files and directories from *source* to *destination*.
-  - `rsync-move` moves files and directories from *source* to *destination*.
-  - `rsync-update` updates files and directories on *destination*.
-  - `rsync-synchronize` synchronizes files and directories between *source* and
-    *destination*.
+- `rsync-copy` copies files and directories from *source* to *destination*.
+- `rsync-move` moves files and directories from *source* to *destination*.
+- `rsync-update` updates files and directories on *destination*.
+- `rsync-synchronize` synchronizes files and directories between *source* and
+  *destination*.
 
-Authors
--------
+## Authors
 
 *The authors of this module should be contacted via the [issue tracker][5].*
 
-  - [Sorin Ionescu](https://github.com/sorin-ionescu)
+- [Sorin Ionescu](https://github.com/sorin-ionescu)
 
 [1]: https://rsync.samba.org
 [2]: https://github.com/Homebrew/homebrew-core