Revert "Work around 2^16 buffer char limit"

Unfortunately, we need to address the problem more fundamentally. The
previous fix causes the end of the buffer to be truncated under some
circumstances.

This reverts commit c77a781912.

CHANGELOG.md

@@ -3,12 +3,6 @@
 All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog].
 
-## Unreleased
-### Bugs fixed
-* Apheleia experiences difficulty formatting buffers longer than 2^16
-  characters. Previously, the formatting operation would fail entirely
-  in this case. Now it works, albeit with degraded performance.
-
 ## 1.1.1 (released 2020-07-16)
 ### Formatters
 * New: [OCamlFormat](https://github.com/ocaml-ppx/ocamlformat) for

apheleia.el

@@ -293,7 +293,7 @@ provided that its exit status is 0."
                      (if (funcall
                           (or exit-status
                               (lambda (status)
-                                (= 0 (logand 255 status))))
+                                (= 0 status)))
                           (process-exit-status proc))
                          (when callback
                            (funcall callback stdout))
@@ -315,11 +315,7 @@ provided that its exit status is 0."
              (with-current-buffer stdin
                (buffer-string))))
           (process-send-eof apheleia--current-process))
-      (error
-       (unless (string-match-p
-                "process .+ no longer connected to pipe; closed it"
-                (error-message-string e))
-         (message "Failed to run %s: %s" name (error-message-string e)))))))
+      (error (message "Failed to run %s: %s" name (error-message-string e))))))
 
 (defun apheleia--write-region-silently
     (start end filename &optional