Write down stile rules for tables in Lua

lua-style.md

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+<!-- vim: set noexpandtab :miv -->
+
+# Tables
+
+## Spacing
+
+<!-- inner spaces -->
+1. Either use one space after `{` and one before `}`
+2. Or neither of them
+3. Put spaces *after* the separator (if at all), never before
+
+	local outer = { {"inner",1}, {"inner",2}, }
+
+<!-- multiline -->
+1. Either put the entire table on one line
+2. Or don't put any items on the same line as the curly braces.
+3. Indent the items of the table
+
+	local oneline = {'hello', 'world',}
+	lcoal multiline = {
+		'hello',
+		'world',
+	}
+
+## Sequence
+
+<!-- comma for lists, semicolon for sets -->
+1. Use commas (`,`) to separate order-dependant items (list)
+2. Use semicolons (`;`) to separate order-independant items (set)
+
+	local ingredients = { "eggs"; "flour"; "milk"; }
+	local steps = { "mix", "fry", }
+
+<!-- semantic last separator -->
+1. Put a separator after the last element if more can logically follow
+2. Put no separator after the last element if none should logically follow
+3. Put no separator after the last element if external conditions must change
+	 for an additional item to be inserted.
+
+	local color = { 0xff, 0x20, 0x40 }
+	local line = { {0, 0}, {0, 20}, {20, 20}, }
+
+## Map
+
+<!-- sequence first -->
+1. Place key-value pairs after the sequence
+2. Put a semantic separator after the last element as with pure sequences for
+	open-ended sequences
+3. Or use a different separator to signal that no items should be added
+
+	local pancakes = {
+		'mix', 'fry';
+		ingredients = { 'milk'; 'eggs'; 'flour' };
+	}
+
+	local pancakes = {
+		'milk'; 'eggs'; 'flour',
+		steps = {'mix', 'fry'};
+	}
+
+<!--
+	This last one looks a bit awkward, but the benefit of the added
+	semantic meaning may well outweigh it looking a bit weird at first.
+-->
+
+<!-- commas for logical order -->
+1. Use commas if the elements follow some logical order
+2. Use semicolons otherwise
+3. Apply same rules as with sequnces for separator after last element
+
+	local point = {x=20, y=30}
+	local tasks = { monday = {'call steve'}, tuesday = {'fix kitchen door'}, }
+	local person = { name="John Doe"; age="Unknown" }
+
+<!-- arbitrary integer keys -->
+1. Treat arbitrary integer keys as string keys
+2. Use square brackets for numbers acting as keys in a map
+3. Judge based on semantic meaning, not on technicalities
+
+	local ages = { [20]="John, Henry"; [21]="William"; }
+	local errors = { [1]="File not Found"; [2]="Permission Denied" }