Table remove by negative fix

[havietisov]

More precise to pure lua behaviour : addional exception added, changed odd and improper check that caused table overflow upon passing something non-numerical as argument to table.remove().
table.remove now accept only numbers and nil as indices (same as pure lua does)
table.remove now does nothing if table is empty and passed index is 0 (same as pure lua does)

[xanathar]

More precise to pure lua behaviour : addional exception added, changed odd and improper check that caused table overflow upon passing something non-numerical as argument to table.remove().

table.remove now accept only numbers and nil as indices (same as pure lua does)

This check already is in the base code..

table.remove now does nothing if table is empty and passed index is 0 (same as pure lua does)

Not true. Out-of-bound indices are valid in Lua and should not throw an exception, just return nil. 0 in an empty table is just a special case of this.

[havietisov]

This check already is in the base code

old one never worked. I fixed it. had a huge headache because of infinitely growing table while passing string as index for table.remove()

[LimpingNinja]

• Needs full coverage (other files missed)
• Validate tests existence coverage for examples provided
• Ensure it covers the stringasint edge

[LimpingNinja]

> a = { 10, 15, 20, 25, 30 }

> table.remove(a,1)
10

> table.remove(a,"fifty")
stdin:1: bad argument #2 to 'remove' (number expected, got string)

> table.remove(a,"15")
stdin:1: bad argument #1 to 'remove' (position out of bounds)

> table.remove(a,"1")
15