Well, getting past the media bullshit in legal matters is always nigh impossible.
Here is Ch 7 Sec 1, the section the judge ruled was violated.
§ 1. Qualifications of electors.
Every citizen 21 years of age, possessing the following qualifications, shall be entitled to vote at all elections subject, however, to such laws requiring and regulating the registration of electors as the General Assembly may enact.
1. He or she shall have been a citizen of the United States at least one month.
2. He or she shall have resided in the State 90 days immediately preceding the election.
3. He or she shall have resided in the election district where he or she shall offer to vote at least 60 days immediately preceding the election, except that if qualified to vote in an election district prior to removal of residence, he or she may, if a resident of Pennsylvania, vote in the election district from which he or she removed his or her residence within 60 days preceding the election.
(Nov. 5, 1901, P.L.881, J.R.1; Nov. 7, 1933, P.L.1559, J.R.5; Nov. 3, 1959, P.L.2160, J.R.3; May 16, 1967, P.L.1048, J.R.5)
Age of Electors. The age at which a citizen is entitled to vote was changed from 21 to 18 years of age. See Amendment XXVI to the Constitution of the United States and section 701 of the act of June 3, 1937 (P.L.1333, No.320), known as the Pennsylvania Election Code.
Short, sweet and easy to understand. Unfortunately, act 77 is not short or easy to understand. It is egregiously long and complex as it deals with the specifics of the ballots and voting.
Information on Pennsylvania Laws. Find Acts on General Legislation Approved and how an act affected other legislation
www.legis.state.pa.us
And, after wasting far to much time going through that tome, I cannot find anything that even remotely looks like a violation of that section of the constitution. This looks like nothing more than an activist judge making a call because he wants the law struck. If I am wrong, what section in Act 77 violate the cited part of the state constitution? The constitutional section in question is very straight forward. The violations should be very easy to identify.