[Rd] [PATCH] Documentation improvements for paste() and substr()/substring()

[Aakriti Kushwaha]

Hello R developers,


Please find attached documentation-only patches with small clarifications
and example improvements in the following files:


   1.

   *paste()** / **paste0()** documentation*

   -

      Clarified why paste0() is slightly more efficient than paste(sep = ""),
      noting that it avoids handling a separator internally.
      -

      Documentation clarification only; no change in behavior.

   2.

   *substr()** / **substring()** documentation*

   -

      Clarified documented behavior when stop / last is NULL, indicating
      extraction continues to the end of the string.
      -

      Added brief examples demonstrating zero-length extraction behavior
      for improved clarity.



All changes are documentation-only and introduce no code or semantic
changes.

The patches were generated using git format-patch and apply cleanly to the
current development version.

I would also like to ask whether I should open Bugzilla entries for these
patches. I do not currently have a Bugzilla account, and would appreciate
guidance on how best to proceed.


Thank you for your time and feedback.


Best regards,

Aakriti Kushwaha