Documentation needs explanation of percent (%)

[bluesabre]

The online documentation, some of the examples show %u or %U as an argument to some of the menu commands.
What do these reference?
Does capitalization matter?
What interprets the % abbreviations, menulibre? a shell? which shell?
What other % sequences are available?
Are multi-letter % abbreviations are available?
Is there an "escape" to pass a % to the command?

Launchpad Details: #LP1871215 Chelmite - 2020-04-06 20:19:37 +0000

[bluesabre]

I've added this to do the documentation: https://github.com/bluesabre/menulibre/wiki/Recognized-Desktop-Entry-Keys#exec

With the above commit, the interface will now refer users to the documentation for the field codes. Thanks for the report!