>>>>> nicola farina <fari...@gmail.com> >>>>> on Thu, 20 Jul 2017 16:51:54 +0200 writes:
> Dear all, > I just installed R 3.4.1 and noticed a change in how user-defined functions > are printed. A small example: > string<-"f<-function(x){\n\tx^2\n}" > cat(string,file="tmp00a.R") > source("tmp00a.R") > f > And this is what I see: > #R 3.4.0 > function(x){ > x^2 > } > #R 3.4.1 > function(x){ > \tx^2 > } > Seems that in 3.4.1 the tab character isn't "rendered". This is rather > annoying since it becomes very difficult to inspect the source code of user > defined functions. This behaviour seems to be present just for the tab > character (\n and \r are displayed correctly). [..............] > Thank you for your attention and your incredible work. Thank you for the flowers. Believe it or not, I've detected this bug about 8 hours ago, after typing menu at the R prompt after receiving a bug report about it. It came from fixing bug PR#16732 (which was about rendering Japanese fonts in a function defintion when printing) https://bugs.r-project.org/bugzilla/show_bug.cgi?id=16732 A (probably shortest possible!) symptom of the bug is that in R <= 3.4.0, > quote(-"\n") -"\n" > whereas in R 3.4.1 (and the current newer development versions of R) > quote(-"\n") -"\\n" > Ideally, fixing this (wrong duplication of "\") will not make bug 16732 resurface. I expect a bug fix by tomorrow. If this is a big problem for you, you will have to upgrade to "R 3.4.1 patched" during the weekend. (Downgrading to R 3.4.0 is not a good idea, compared to the above!) Martin Maechler, ETH Zurich > Nicola Farina > [[alternative HTML version deleted]] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ (do learn to post in plain text on R-devel, please) ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel