Key "MimeType" is a list and needs a semicolon as trailing character

[probonopd]

https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#mime-types

[matthijskooijman]

Commit looks good to me. However, it seems that the trailing ; is not strictly required. The spec you linked says (emphasis by me):

Some keys can have multiple values. In such a case, the value of the key is specified as a plural: for example, string(s). The multiple values should be separated by a semicolon and the value of the key may be optionally terminated by a semicolon. Trailing empty strings must always be terminated with a semicolon. Semicolons in these values need to be escaped using ;.

[probonopd]

At least desktop-file-validate complains when the trailing semicolon is missing,