diff --git a/lisp/calc/calc-graph.el b/lisp/calc/calc-graph.el
index fb817b1bc3d..804ee3944c7 100644
--- a/lisp/calc/calc-graph.el
+++ b/lisp/calc/calc-graph.el
@@ -1417,7 +1417,9 @@ This \"dumb\" driver will be present in Gnuplot 3.0."
   "Send ARGS to Gnuplot.
 Returns nil if Gnuplot signaled an error."
   (calc-graph-init)
-  (let ((cmd (concat (mapconcat 'identity args " ") "\n")))
+  ;; We prepend the newline to work around a bug in Gnuplot, whereby it
+  ;; sometimes does not display the plot, see bug#72778.
+  (let ((cmd (concat "\n" (mapconcat 'identity args " ") "\n")))
     (or (calc-graph-w32-p)
 	(accept-process-output))
     (with-current-buffer calc-gnuplot-buffer
diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index fb4b9afc073..669638544ce 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -3030,11 +3030,11 @@ machine then modifies `tramp-remote-process-environment' and
                  (tramp-dissect-file-name default-directory 'noexpand)))))
     (if vec
         (python-shell--tramp-with-environment vec extraenv bodyfun)
-      (let ((process-environment
-             (append extraenv process-environment))
-            (exec-path
-             ;; FIXME: This is still Python-specific.
-             (python-shell-calculate-exec-path)))
+      (cl-letf (((default-value 'process-environment)
+		 (append extraenv process-environment))
+		((default-value 'exec-path)
+		 ;; FIXME: This is still Python-specific.
+		 (python-shell-calculate-exec-path)))
         (funcall bodyfun)))))
 
 (defun python-shell--tramp-with-environment (vec extraenv bodyfun)
@@ -4549,6 +4549,9 @@ def __PYTHON_EL_native_completion_setup():
             readline.parse_and_bind('tab: complete')
             # Require just one tab to send output.
             readline.parse_and_bind('set show-all-if-ambiguous on')
+            # Avoid ANSI escape characters in the output
+            readline.parse_and_bind('set colored-completion-prefix off')
+            readline.parse_and_bind('set colored-stats off')
             # Avoid replacing common prefix with ellipsis.
             readline.parse_and_bind('set completion-prefix-display-length 0')
 
diff --git a/lisp/use-package/use-package-core.el b/lisp/use-package/use-package-core.el
index f30e85e65ec..4df7fee3bdd 100644
--- a/lisp/use-package/use-package-core.el
+++ b/lisp/use-package/use-package-core.el
@@ -1415,11 +1415,13 @@ enable gathering statistics."
           (when fun
             (mapcar
              #'(lambda (sym)
-                 `(add-hook
-                   (quote ,(intern
-                            (concat (symbol-name sym)
-                                    use-package-hook-name-suffix)))
-                   (function ,fun)))
+                 (if (boundp sym)
+                     `(add-hook (quote ,sym) (function ,fun))
+                   `(add-hook
+                     (quote ,(intern
+                              (concat (symbol-name sym)
+                                      use-package-hook-name-suffix)))
+                     (function ,fun))))
              (use-package-hook-handler-normalize-mode-symbols syms)))))
     (use-package-normalize-commands args))))