[Rd] Missing y label

[Therneau, Terry M., Ph.D.]

My on-screen plots with the latest build are acting strange.  If the y label is longer 
than some small value it is not shown.

Here is the script of a job.  A pdf graph is fine.  I use xubuntu as the windowing system.


tmt-local1334% R --vanilla

R Under development (unstable) (2017-08-31 r73172) -- "Unsuffered Consequences"
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Platform: x86_64-pc-linux-gnu (64-bit)

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   Natural language support but running in an English locale

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 > sessionInfo()
R Under development (unstable) (2017-08-31 r73172)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.2 LTS

Matrix products: default
BLAS: /usr/local/src/R-devel/lib/libRblas.so
LAPACK: /usr/local/src/R-devel/lib/libRlapack.so

locale:
  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=C
  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
  [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods base

loaded via a namespace (and not attached):
[1] compiler_3.5.0
 > plot(1:5, 1:5, ylab="abcde")  # has a y label
 > plot(1:5, 1:5, ylab="abcdefghi")  # no label