Gedit

Note: this highlights based on syntax and does NOT attempt to validate arguments or keywords. The syntax highlighting is unlikely to be 100% accurate and is open to improvement.

The syntax highlighting will automatically be applied to all files with conky in their name. eg. my_config.conky (unfortunately it also triggers for the conky.lang file itself, you should set it to XML manually)

gtksourceview Syntax Highlight documentation
Regex Tutorial
Regex Testing

Developers: The main context (id="conkyrc") is where gedit begins. This main context then references other sub-contexts. Each context can apply styles to itself, sub-strings from its regexs, or its contents (in the case of <start><end> "container" contexts). If you are ever confused by something, try searching for XML attributes in the gtksourceview docs. If you find a particularly complex regex, try using the Regex Tester linked above, and bear in mind that gtksourceview adds some extra regex syntax (i.e. \%[ ... ] and \%{ ... }).

for medit v1.1.1: /usr/share/medit/language-specs/conky.lang

for medit - older versions: /usr/share/medit-1/language-specs/conky.lang

for gedit v2.x /usr/share/gtksourceview-2.0/language-specs/conky.lang or (for single user) ~/.local/share/gtksourceview-2.0/language-specs/conky.lang

for gedit v3.x /usr/share/gtksourceview-3.0/language-specs/conky.lang or (for single user) ~/.local/share/gtksourceview-3.0/language-specs/conky.lang