CHANGES IN knitr VERSION 1.17

MAJOR CHANGES

• the automatic detection of chunk dependencies (via the chunk option autodep = TRUE) is more conservative by default now; chunk B depends on chunk A if any variables in B are created in A, no matter if these variables are local or global in B; you can use the chunk option cache.globals to manually provide a vector of variable names that should be considered "global" to avoid the dependency when local variables in B are also found in A (thanks, @knokknok, #1403)

• for engines css and js, the source code will be displayed by default just like R code chunks, and you can hide the source code using the chunk option echo = FALSE (thanks, @skadauke, #1408)

• for kable(), the digits argument will be applied to columns of the class difftime (thanks, @RoyalTS, #1396)

BUG FIXES

• when a table only has one column, kable() does not work in R Markdown documents (thanks, @expersso, yihui/printr#31)

• message(..., appendLF = FALSE) does not work (thanks, Anastasius, http://stackoverflow.com/q/44059508/559676)

• hook_optipng() does not work correctly when a code chunk does not contain any R-generated plots (thanks, @@zevross-spatial, #1404)

• markdown lines starting with three backticks won't be considered inline code chunks (thanks, @gadenbuie, #1416)