Improved PR

[hofnerb]

No description provided.

[coveralls]

Coverage increased (+0.004%) to 79.479% when pulling 251bca0 on hofnerb:patch-1 into 77ac6a2 on boost-R:master.

[mvkorpel]

Yes, there is no need to introduce a new variable to hold the matched function. It is just a personal habit of mine not to modify the arguments of a function. This is one of the things checked by codetools::checkUsagePackage("mboost", all = TRUE). Using the same name for an updated value is not a problem in this case, but may be in others, due to lazy evaluation employed by R. It is perfectly fine to modify an argument in many (most?) cases, and that is probably why the corresponding codetools check is not used by default, hence the all = TRUE.