Future fix Values for phrases are identically (2.0.2)

Hi,

only a very small mistake

The phrases "please_enter_title_using_only_alphanumeric_dot" and "please_enter_title_using_only_alphanumeric_dot_underscore" got both identical content
Please enter a title using only a-z, A-Z, 0-9, _ and . characters.

In my opinion the first one should use
Please enter a title using only a-z, A-Z, 0-9 and . characters.

The phrases are actually different with different uses, but the titles are confusing. Likely too late to change them right now, maybe for 2.1.

Note that one is "Please enter a title..." and the other is "Please enter a value...". One is used as the error for an invalid template title, and the other is used much more generically.