Error in re-building vignettes:
  ...
pandoc.exe: Could not fetch http://i.imgur.com/KkAETvk.jpg
TooManyRedirects [Response {responseStatus = Status {statusCode = 301, statusMessage = "Moved Permanently"}, responseVersion = HTTP/1.1, responseHeaders = [("Retry-After","0"),("Location","https://i.imgur.com/original/K/k/A/E/KkAETvk"),("Fastly-Debug-Digest","ac807d9fcf9ae67c22f35afebb6b8300b302f6f0f46dc5319d2b3f56df595391"),("Content-Length","0"),("Accept-Ranges","bytes"),("Date","Fri, 16 Jun 2017 12:56:57 GMT"),("Age","0"),("Connection","keep-alive"),("X-Served-By","cache-iad2139-IAD, cache-hhn1547-HHN"),("X-Cache","HIT, HIT"),("X-Cache-Hits","0, 10"),("X-Timer","S1497617817.123475,VS0,VE0"),("Vary","Accept"),("Access-Control-Allow-Methods","GET, OPTIONS"),("Access-Control-Allow-Origin","*"),("Server","cat factory 1.0")], responseBody = "", responseCookieJar = CJ {expose = []}, responseClose' = ResponseClose},Response {responseStatus = Status {statusCode = 301, statusMessage = "Moved Permanently"}, responseVersion = HTTP/1.1, responseHeaders = 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Warning: running command '"D:/compiler/pandoc/pandoc" +RTS -K512m -RTS using_mag.utf8.md --to html --from markdown+autolink_bare_uris+ascii_identifiers+tex_math_single_backslash --output using_mag.html --smart --email-obfuscation none --self-contained --standalone --section-divs --table-of-contents --toc-depth 2 --template "d:\RCompile\CRANpkg\lib\3.5\rmarkdown\rmd\h\default.html" --highlight-style pygments --css "d:\RCompile\CRANpkg\lib\3.5\rmarkdown\rmarkdown\templates\html_vignette\resources\vignette.css" --mathjax --variable "mathjax-url:https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"' had status 67
Error: processing vignette 'using_mag.Rmd' failed with diagnostics:
pandoc document conversion failed with error 67
Execution halted