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User:Art LaPella/Citation template double period bug

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Duplicate period examples and counterexamples

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The double period bug occurs because Category:Citation templates such as Template:Cite web and Template:Cite book, but for some reason not Template:Citation itself, add periods after many of their parameters. If that parameter has wrongly been ended with a period, usually because of an abbreviation, then the template may add a duplicate period. At present about 45,000 Wikipedia articles have this problem, placing it among Wikipedia's most frequent typos. There's more analysis at Template talk:Cite web/Archive 6#Double period bug.

Search for ".." to make the examples stand out. For instance, the first reference ends with duplicate periods, and the second has duplicate periods after "1890". For some obscure reason, a few examples that look like ".." can't be found by searching for "..". I have so many examples to help my WP:AWB software learn to distinguish when to remove a period and when to leave it alone; AWB reads the code you can see on the edit page, not what you see here.

Examples

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  • Harris, N. (2006). The Foreign Revolution. How Overseas Footballers Changed the English Game. London: Aurum Press Ltd.
  • Ramsden, J. (2006). Don't Mention the War. The British and the Germans since 1890. London: Little, Brown Book Group.
  • Foster, Kathleen A. "Thomas Eakins - Scenes from a Modern Life: Biography 1886: Indicted by Rumor". PBS. Retrieved January 6, 2008.
  • Edney, Matthew H. "The Cartographic Creation of New England". Osher Map Library and Smith Center for Cartographic Education, University of Southern Maine. Retrieved 2007-05-03.
  • Chartier, Charles S. "Livestock in Plymouth Colony". Plymouth Archaeological Rediscovery Project. Retrieved 2007-05-03.
  • "Boortz Bio". Cox Radio Interactive & Cox Radio, Inc. 2007. Retrieved 2007-05-18.
  • "Jack M. Whiteside, P.E." Barnes and Click Inc. 2007. Retrieved 2007-05-18.
  • "The Top Talk Radio Audiences". Focus Communications, Inc. 2007. Retrieved 2007-05-18.
  • "Imagination is Fun by Gregg Calkins". F.A.N.A.C. Inc. Retrieved 23 December 2007.
  • "Westercon 55 Progress Report 2" (PDF). Los Angeles Science Fantasy Society, Inc. Retrieved 23 December 2007.
  • Ashley, Michael (1976). The History of the Science Fiction Magazine Vol. 3 1946–1955. Chicago: Contemporary Books, Inc. ISBN 0-8092-7842-1.
  • Atheling, Jr., William (1974). More Issues at Hand. Chicago: Advent: Publishers, Inc. ISBN 0-911682-18-X.
  • Malcolm Edwards and Peter Nicholls, "Astounding Science-Fiction", in Clute, John (1993). The Encyclopedia of Science Fiction. New York: St. Martin's Press, Inc. p. 62. ISBN 0-312-09618-6. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Malcolm Edwards and Peter Nicholls, "SF Magazines", in Clute, John (1993). The Encyclopedia of Science Fiction. New York: St. Martin's Press, Inc. p. 1066. ISBN 0-312-09618-6. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Brian Stableford, "Imagination", in Clute, John (1993). The Encyclopedia of Science Fiction. New York: St. Martin's Press, Inc. p. 615. ISBN 0-312-09618-6. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Peter Nicholls and John Clute, "Genre SF", in Clute, John (1993). The Encyclopedia of Science Fiction. New York: St. Martin's Press, Inc. p. 483. ISBN 0-312-09618-6. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Brian Stableford, "Amazing Stories", in Clute, John (1993). The Encyclopedia of Science Fiction. New York: St. Martin's Press, Inc. p. 25. ISBN 0-312-09618-6. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  • Tuck, Donald H. (1982). The Encyclopedia of Science Fiction and Fantasy: Volume 3. Chicago: Advent: Publishers, Inc. ISBN 0-911682-26-0.
  • "100 best companies for working mothers 2004". Working Mother Media, Inc. Archived from the original on 2004-10-17.
  • "Caterpillar Brings Engines with ACERT Technology to Off-Road Machines". Caterpillar Inc. Retrieved 2007-08-05.
  • Bongianni, Maurizio (editor) (1988). Simon & Schuster's Guide to Horses and Ponies. New York, NY: Simon & Schuster, Inc. ISBN 0671660683. {{cite book}}: |author= has generic name (help)
  • "Responsibility for the Terrorist Atrocities in the United States, 11 September 2001". 10 Downing Street, Office of the Prime Minister of the U.K. November 2001. Retrieved 2006-09-29.{{cite web}}: CS1 maint: date and year (link)
  • Gordon, Joseph S. (1988). "East German psychological operations: a 1965 case study". In Gordon, Joseph S. (ed.). Psychological operations: the Soviet challenge. Boulder, CO: Westview Press. ISBN 9780813373959.
  • Baker, Frederick (2004). "The Berlin Wall". In Ganster, Paul; Lorey, David E. (eds.). Borders and border politics in a globalizing world. Lanham, MD: Rowman & Littlefield. ISBN 9780842051040.
  • "Encyclopedias and Dictionaries". Encyclopædia Britannica, 15th ed. Vol. 18. Encyclopædia Britannica. 2007. pp. 257–286.
  • Aspinall, Robert W.. Teachers' Unions and the Politics of Education in Japan. State University of New York Press; 2001. ISBN 0-7914-5050-3.
  • Fuller, R. Buckminster (1963). [[Operating Manual for Spaceship Earth]] (First ed.). New York: E.P. Dutton & Co. ISBN 0-525-47433-1. Retrieved 2007-04-21. {{cite book}}: URL–wikilink conflict (help)
  • Meissner, Carl (1856). "Proteaceae". In de Candolle, A. P. (ed.). Prodromus systematis naturalis regni vegetabilis. Vol. 14. Paris: Sumptibus Sociorum Treuttel et Wurtz.
  • Duggan, Charles (1965). "From the Conquest to the Death of John". In Lawrence, C. H. (ed.). The English Church and the Papacy in the Middle Ages (1999 reprint ed.). Stroud: Sutton Publishing. pp. 63–116. ISBN 0-7509-1947-7.
  • Cheng MS, Ferkel RD, Applegate GR (1995). "Osteochondral lesion of the talus: A radiologic and surgical comparison" (Document). New Orleans, LA. {{cite document}}: Cite document requires |publisher= (help)CS1 maint: multiple names: authors list (link) Paper presented at Annual Meeting of the Academy of Orthopaedic Surgeons.

Counterexamples

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