More from WaPo:
The disclosure came in a filing in a case unrelated to Assange. Assistant U.S. Attorney Kellen S. Dwyer, urging a judge to keep the matter sealed, wrote "due to the sophistication of the defendant and the publicity surrounding the case, no other procedure is likely to keep confidential the fact that Assange has been charged." Later, Dwyer wrote the charges would "need to remain sealed until Assange is arrested."
Dwyer is also assigned to the WikiLeaks case. People familiar with the matter said what Dwyer was disclosing was true, but unintentional....On Thursday evening, Seamus Hughes, the deputy director of the Program on Extremism at George Washington University who is known for scrubbing court filings, joked about the apparent error on Twitter — which first brought it to the attention of reporters.
-RWDid the US Department of Justice just accidentally reveal that it has charged WikiLeaks' publisher Julian Assange, in a secret charges request it filed in another case at the Eastern District of Virginia, with a cut-and-paste error? https://t.co/XCpean1yof pic.twitter.com/dZ6JjAFGlk— WikiLeaks (@wikileaks) November 16, 2018
Guys, this is truly an amazing find by @SeamusHughes. My hypothesis is: prosecutors used a filing in an Assange-related case as a template for a filing in this case, but forgot to change the one paragraph. If true, it means sealed charges have been filed against Julian Assange. https://t.co/BWkC8Mfz83— Mike Levine (@MLevineReports) November 16, 2018