make easier for case-insensitive file systems

git-svn-id: https://svn.r-project.org/R/trunk@63148 00db46b3-68df-0310-9c12-caf00c1e9a41
add check for platform-specific graphics devices

git-svn-id: https://svn.r-project.org/R/trunk@63149 00db46b3-68df-0310-9c12-caf00c1e9a41
Make sure the chain count in hashed environments in decremented when
variables are removed to avoid unbounded growth of hashed environments
(PR 15363).


git-svn-id: https://svn.r-project.org/R/trunk@63150 00db46b3-68df-0310-9c12-caf00c1e9a41
Less aggressive fix for PR#15350.  Most binary operators ignore arg names.

git-svn-id: https://svn.r-project.org/R/trunk@63152 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak

git-svn-id: https://svn.r-project.org/R/trunk@63154 00db46b3-68df-0310-9c12-caf00c1e9a41
Add vmaxget/set in printMatrix and printArray.


git-svn-id: https://svn.r-project.org/R/trunk@63155 00db46b3-68df-0310-9c12-caf00c1e9a41
seems identical() is too fussy

git-svn-id: https://svn.r-project.org/R/trunk@63157 00db46b3-68df-0310-9c12-caf00c1e9a41
more on portable graphics devices
mention explicitly what are environment variables


git-svn-id: https://svn.r-project.org/R/trunk@63158 00db46b3-68df-0310-9c12-caf00c1e9a41
safer not to use as.name before eval

git-svn-id: https://svn.r-project.org/R/trunk@63161 00db46b3-68df-0310-9c12-caf00c1e9a41
merged unirootS() into uniroot(), remaining back compatible; 
more to come (not the next couple of days, tough)

git-svn-id: https://svn.r-project.org/R/trunk@63162 00db46b3-68df-0310-9c12-caf00c1e9a41
clean up after MM's r63163

git-svn-id: https://svn.r-project.org/R/trunk@63164 00db46b3-68df-0310-9c12-caf00c1e9a41
refine cleanup if regression test fails

git-svn-id: https://svn.r-project.org/R/trunk@63165 00db46b3-68df-0310-9c12-caf00c1e9a41
vectorIndex now duplicates when needed for [[<- (PR15374).


git-svn-id: https://svn.r-project.org/R/trunk@63166 00db46b3-68df-0310-9c12-caf00c1e9a41
Improve code and documentation.

git-svn-id: https://svn.r-project.org/R/trunk@63168 00db46b3-68df-0310-9c12-caf00c1e9a41
Improve test for installed packages in package sources.

git-svn-id: https://svn.r-project.org/R/trunk@63169 00db46b3-68df-0310-9c12-caf00c1e9a41
document use of stats::model.frame etc

git-svn-id: https://svn.r-project.org/R/trunk@63170 00db46b3-68df-0310-9c12-caf00c1e9a41
manage R_alloc stack in helpers where possible, for prudence
add comments where not possible


git-svn-id: https://svn.r-project.org/R/trunk@63171 00db46b3-68df-0310-9c12-caf00c1e9a41
document change of return value, which broke DierckxSpline.
doX could have been NA, and was in 9 packages.


git-svn-id: https://svn.r-project.org/R/trunk@63172 00db46b3-68df-0310-9c12-caf00c1e9a41
assertCondition() tweaks (from jmc); add \link{}s to it

git-svn-id: https://svn.r-project.org/R/trunk@63173 00db46b3-68df-0310-9c12-caf00c1e9a41
comments

git-svn-id: https://svn.r-project.org/R/trunk@63174 00db46b3-68df-0310-9c12-caf00c1e9a41