fix: parse error for atomSymbol separate with one space

[Rasic2]

If the atomSymbol in POSCAR or XDATCAR separated with only one space, like this:

Ce O  C  O

The atomSymbol will return ["CeO", "C", "O"], and raise the warning: "declaration of atomary species wrong:"

This PR fix this by replace the code below

  var atomSymbols = lines[5]
    .replace(/\s+/, "")
    .replace(/\s+$/, "")
    .split(/\s+/);

with this

  var atomSymbols = lines[5]
    .replace(/\s*/, "")
    .replace(/\s+$/, "")
    .split(/\s+/);

[dkoes]

I am not familiar with these formats. Why is the this the right fix? Changing from \s+ to \s* will only remove space if it is at the very beginning. If this is what is intended, then why not use .trim to remove leading and trailing white space?

[dkoes]

This is addressed in d9efe75