Fix typos and doc strings in native-compilation files

Fix typos and doc strings in native-compilation files

* lisp/emacs-lisp/comp.el (comp-speed, comp-debug, comp-verbose)
(comp-always-compile, comp-deferred-compilation-deny-list)
(comp-bootstrap-deny-list, comp-never-optimize-functions)
(comp-async-jobs-number, comp-async-cu-done-hook)
(comp-async-all-done-hook, comp-async-env-modifier-form)
(comp-pass, comp-native-compiling, comp-post-pass-hooks)
(comp-known-predicate-p, comp-pred-to-cstr)
(comp-symbol-values-optimizable, comp-limple-assignments)
(comp-limple-calls, comp-limple-branches, comp-block)
(comp-vec--verify-idx, comp-vec-aref, comp-vec-append)
(comp-vec-prepend, comp-block-preds)
(comp-ensure-native-compiler, comp-log, comp-log-func)
(comp-loop-insn-in-block, comp-byte-frame-size)
(comp-add-func-to-ctxt, comp-spill-lap-function, comp-spill-lap)
(comp-lap-fall-through-p, comp-new-frame, comp-emit-set-call)
(comp-copy-slot, comp-latch-make-fill, comp-emit-cond-jump)
(comp-body-eff, comp-op-case, comp-prepare-args-for-top-level)
(comp-limplify-top-level, comp-negate-arithm-cmp-fun)
(comp-emit-assume, comp-cond-cstrs-target-mvar)
(comp-function-foldable-p, comp-function-call-maybe-fold)
(comp-form-tco-call-seq, comp-clean-up-stale-eln)
(comp-delete-or-replace-file, comp--native-compile)
(native--compile-async, native-compile)
(batch-byte-native-compile-for-bootstrap): Fix typos, wording, and
punctuation in doc strings.
* lisp/loadup.el: Fix typos.

* src/lread.c (syms_of_lread): Doc fix.