Mention AUR package in documentation (#125)

Additionally, small fixes it nano highlighting

README.md

@@ -29,6 +29,8 @@ How to get it/build it
 - Or, if you want/need a bleeding edge development version, you can:
   - download a build artifact zipfile from a recent [github action build](https://github.com/irmen/prog8/actions).
   - you can also compile it yourself from source. [Instructions here](https://prog8.readthedocs.io/en/latest/compiling.html).
+- Alternatively, you can also install the compiler as a package on some linux distros:
+  - Arch (via AUR): [`prog8`](https://aur.archlinux.org/packages/prog8)
 
 Community
 ---------

docs/source/compiling.rst

@@ -16,6 +16,17 @@ Then you can choose a few ways to get a compiler:
 #. download a recent "fat-jar" (called something like "prog8compiler-all.jar") from `the releases on Github <https://github.com/irmen/prog8/releases>`_
 #. run the compiler with "java -jar prog8compiler.jar" to see how you can use it (use the correct name and version of the jar file you've downloaded).
 
+**Or, install via a Package Manager:**
+
+Currently, it's only available on `AUR <https://wiki.archlinux.org/title/Arch_User_Repository>`_ for Arch and compatible systems. 
+The package's called ```prog8`` <https://aur.archlinux.org/packages/prog8>`_.
+
+This package, alongside the compiler itself, also globally installs syntax highlighting for ``vim`` and ``nano``.
+In order to run compiler, you can type either ``p8compile`` or ``prog8c``. The usage of those commands is exatcly the same as with ``java -jar`` method.
+
+In case you prefer to install AUR packages in a traditional manner, make sure to install ```tass64`` package <https://aur.archlinux.org/packages/tass64>`_ 
+before installing prog8, as ```makepkg`` <https://wiki.archlinux.org/title/Makepkg>`_ itself doesn't fetch AUR dependencies.
+
 **Or, download a bleeding edge development version from Github:**
 
 #. find the latest CI build on  `the actions page on Github <https://github.com/irmen/prog8/actions>`_

syntax-files/nano/prog8.nanorc

@@ -8,7 +8,7 @@ syntax prog8 "\.p8$"
 comment ";"
 
 # Index thing and Array literals
-##color teal "\[[^]]*\]" ## nword
+##color teal "\[[^]]*\]"
 color teal "\]"
 color teal "\["
 
@@ -46,7 +46,7 @@ color lagoon "->"
 color cyan "[[:alnum:]_]+:["']"
 
 # char literal
-color brightcyan "'([^\\]|\\([^ux]|u[0-9A-Fa-f]{4}|x[[:alnum:]]{2}))'"
+color brightcyan "'([^\\]|\\([^ux]|u[0-9A-Fa-f]{4}|x[0-9A-Fa-f]{2}))'"
 
 # %asm handling
 color normal start="%[Aa][Ss][Mm]" end="}}"