Misc textual editing

Misc textual editing

* doc/ref/api-scheduling.texi (Asyncs): "queueing" -> "queuing".

* benchmark-suite/lib.scm, doc/sources/unix.texi (Unix conventions),
  test-suite/lib.scm: "postpend" -> "append".

* doc/ref/api-compound.texi (Array Syntax, Dictionary Types),
  doc/ref/api-control.texi (Catch), doc/ref/api-data.texi (Complex
  Numbers, Conversion, Random, Symbol Props, Symbol Uninterned),
  doc/ref/api-options.texi (Build Config, Common Feature Symbols),
  doc/ref/api-regex.texi (Match Structures),
  doc/ref/api-undocumented.texi, doc/ref/compiler.texi (Tree-IL,
  GLIL), doc/ref/data-rep.texi (Immediate objects), doc/ref/goops.texi
  (Slot Description Example), doc/ref/history.texi (A Scheme of Many
  Maintainers, Status), doc/ref/libguile-program.texi (Available
  Functionality), doc/ref/misc-modules.texi (Formatted Output),
  doc/ref/mod-getopt-long.texi (getopt-long Reference),
  doc/ref/posix.texi (Network Socket Address, Network Sockets and
  Communication), doc/ref/srfi-modules.texi (SRFI-1 Association Lists,
  SRFI-10, SRFI-19 String to date, SRFI-27 Random Sources),
  doc/ref/vm.texi (Instruction Set, Top-Level Environment
  Instructions, Procedure Call and Return Instructions),
  doc/sources/unix.texi (Unix conventions): Correct spacing after
  "i.e." and "e.g.".