"with" doesn't work with names with blanks

Hello, All:

	  Column names in a data.frame are not supposed to have trailing
blanks.  However, a CRAN package created one, which threw an error with
"with".  Consider the following example:

  > (tst <- data.frame(1))
    X1
1  1
  > names(tst) <- 'x '
  > tst$x
[1] 1
  > with(txt, x)
Error in with(txt, x) : object 'txt' not found

	  I think it's interesting that "tst$x" works, but "with(txt, x)".

	  Comments?
tst$x works because of partial name matching.  (That leniency is one of 
the reasons for advice to avoid using $ in programs.)  It would be chaos 
if with() used partial name matching.

You can use

with(txt, `x `)

to include the space in the name.

Duncan Murdoch

	  It's not a major problem, though it took me a while to diagnose.  (I
reported it to the maintainer of the package that returned a data.frame
with names with trailing blanks.)

	  Thanks, for all your work in maintaining and upgrading R -- and in
responding to emails from this list.

	  Spencer Graves

  > sessionInfo()
R version 4.2.0 (2022-04-22)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Big Sur 11.6.5

Matrix products: default
LAPACK:
/Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

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

loaded via a namespace (and not attached):
[1] compiler_4.2.0 tools_4.2.0
  >

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"with" doesn't work with names with blanks

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