Vim: Ignore .*.s[a-w][a-z] and .s[a-w][a-z] swap files

.*.s[a-w][a-z] matches named swap files.
.s[a-w][a-z] matches unnamed swap files.
Vim: Forgot to change *.s[a-w][a-z] to .*.s[a-w][a-z]
Merge pull request #751 from nysa/master

Vim: Ignore .*.s[a-w][a-z] and .s[a-w][a-z] swap files