plugins: Use get_option_enum where appropriate

moduleapi: Add enum config option method For when a setting has a few fixed values it can take

tools: Fix file ending of mod2spec.sh (thanks buildbot) Accidentally .lua ?

util.human.io: Fix pattern in parse_duration() to cover all used letters Notably 'h' was missing. Awkwardly, 'hour' would result in 'ho' which was missing from table.

util.human.io: Add tests for parse_duration() (some failing)

util.human.io: Include relevant arguments in test messages This way the relevant arguments are shown in case a test case fails

util.human.io: Use tail call in test to get correct line numbers This is probably not guaranteed to work and might vary with Lua version, but it's good enough for me to get accurate line numbers out of Busted that don't all point to the test() function.

tools: Add mod2spec.sh, turns util.example into spec/util_example_spec.lua Useful for opening a module and its tests at the same, can be awkward to auto-complete sometimes. sensible-editor util/example.lua $(./tools/mod2spec.sh util.example)

editorconfig: Include the command used to normalize *.xml The double asterisk seems unnecessary.

editorconfig: Specify max line length to match luacheck settings