A few errors that emerged from my close reading of SRFI 140 that I think can be safely corrected without requiring a post-finalization note.

1) The prototype for string-pad uses "text" instead of "istring".

2) Read-string is missing from the list of R7RS procedures that should return istrings.

3) In the "Libraries" section, for "immutable-string-returning" read "mutable-string-returning".