Don't quote nil and t in doc strings and comments

* test/src/minibuf-tests.el (test-try-completion-ignore-case):
* test/lisp/url/url-auth-tests.el
(url-auth-test-digest-auth-retrieve-cache):
* test/lisp/subr-tests.el (subr-tests-add-hook-depth):
* test/lisp/so-long-tests/so-long-tests.el
(so-long-tests-invisible-buffer-function):
* test/lisp/emacs-lisp/tabulated-list-test.el (tabulated-list-sort):
* src/xfaces.c:
* src/process.c (Finterrupt_process):
(syms_of_process):
* src/minibuf.c (Fread_from_minibuffer):
(Fcompleting_read):
(syms_of_minibuf):
* src/dispnew.c (syms_of_display):
* src/data.c:
* lisp/so-long.el (so-long--hack-local-variables):
* lisp/progmodes/elisp-mode.el (elisp--xref-find-definitions):
(elisp--xref-find-definitions):
* lisp/org/ox-html.el (org-html-htmlize-output-type):
* lisp/org/org-agenda.el (org-agenda-do-in-region):
* lisp/net/tramp.el:
* lisp/minibuffer.el (set-minibuffer-message):
* lisp/isearch.el (isearch-wrap-pause):
(isearch-repeat-on-direction-change):
* lisp/emacs-lisp/timer.el (timer):
* lisp/emacs-lisp/package.el (package-read-archive-contents):
* lisp/emacs-lisp/faceup.el (faceup-next-property-change):
* lisp/emacs-lisp/comp.el (comp-func):
* lisp/emacs-lisp/comp-cstr.el (comp-cstr-empty-p):
* lisp/emacs-lisp/cl-macs.el (cl-do):
(cl-do*):
(cl--self-tco):
* lisp/emacs-lisp/bytecomp.el (byte-compile-unresolved-functions):
(byte-compile-cond-jump-table): Don't quote t and nil.

lisp/emacs-lisp/bytecomp.el

@@ -551,7 +551,7 @@ has the form (autoload . FILENAME).")
   "Alist of undefined functions to which calls have been compiled.
 Each element in the list has the form (FUNCTION POSITION . CALLS)
 where CALLS is a list whose elements are integers (indicating the
-number of arguments passed in the function call) or the constant `t'
+number of arguments passed in the function call) or the constant t
 if the function is called indirectly.
 This variable is only significant whilst compiling an entire buffer.
 Used for warnings when a function is not known to be defined or is later
@@ -4417,7 +4417,7 @@ Return (TAIL VAR TEST CASES), where:
          (cases (nth 2 switch))
          jump-table test-objects body tag default-tag)
     ;; TODO: Once :linear-search is implemented for `make-hash-table'
-    ;; set it to `t' for cond forms with a small number of cases.
+    ;; set it to t for cond forms with a small number of cases.
     (let ((nvalues (apply #'+ (mapcar (lambda (case) (length (car case)))
                                       cases))))
       (setq jump-table (make-hash-table
@@ -4446,7 +4446,7 @@ Return (TAIL VAR TEST CASES), where:
     (byte-compile-out 'byte-switch)
 
     ;; When the opcode argument is `byte-goto', `byte-compile-goto' sets
-    ;; `byte-compile-depth' to `nil'. However, we need `byte-compile-depth'
+    ;; `byte-compile-depth' to nil. However, we need `byte-compile-depth'
     ;; to be non-nil for generating tags for all cases. Since
     ;; `byte-compile-depth' will increase by at most 1 after compiling
     ;; all of the clause (which is further enforced by cl-assert below)

lisp/emacs-lisp/cl-macs.el

@@ -1762,7 +1762,7 @@ Once the END-TEST becomes true, the RESULT forms are evaluated (with
 the VARs still bound to their values) to produce the result
 returned by `cl-do'.
 
-Note that the entire loop is enclosed in an implicit `nil' block, so
+Note that the entire loop is enclosed in an implicit nil block, so
 that you can use `cl-return' to exit at any time.
 
 Also note that END-TEST is checked before evaluating BODY.  If END-TEST
@@ -1791,7 +1791,7 @@ Once the END-TEST becomes true, the RESULT forms are evaluated (with
 the VARs still bound to their values) to produce the result
 returned by `cl-do*'.
 
-Note that the entire loop is enclosed in an implicit `nil' block, so
+Note that the entire loop is enclosed in an implicit nil block, so
 that you can use `cl-return' to exit at any time.
 
 Also note that END-TEST is checked before evaluating BODY.  If END-TEST
@@ -2071,7 +2071,7 @@ Like `cl-flet' but the definitions can refer to previous ones.
   ;; even handle mutually recursive functions.
   (letrec
       ((done nil) ;; Non-nil if some TCO happened.
-       ;; This var always holds the value `nil' until (just before) we
+       ;; This var always holds the value nil until (just before) we
        ;; exit the loop.
        (retvar (make-symbol "retval"))
        (ofargs (mapcar (lambda (s) (if (memq s cl--lambda-list-keywords) s

lisp/emacs-lisp/comp-cstr.el

@@ -134,7 +134,7 @@ Integer values are handled in the `range' slot.")
                     :neg (neg cstr))))
 
 (defsubst comp-cstr-empty-p (cstr)
-  "Return t if CSTR is equivalent to the `nil' type specifier or nil otherwise."
+  "Return t if CSTR is equivalent to the nil type specifier or nil otherwise."
   (with-comp-cstr-accessors
     (and (null (typeset cstr))
          (null (valset cstr))

lisp/emacs-lisp/comp.el

@@ -901,8 +901,8 @@ non local exit (ends with an `unreachable' insn)."))
   (lap () :type list
        :documentation "LAP assembly representation.")
   (ssa-status nil :type symbol
-       :documentation "SSA status either: 'nil', 'dirty' or 't'.
-Once in SSA form this *must* be set to 'dirty' every time the topology of the
+       :documentation "SSA status either: nil, `dirty' or t.
+Once in SSA form this *must* be set to `dirty' every time the topology of the
 CFG is mutated by a pass.")
   (frame-size nil :type integer)
   (vframe-size 0 :type integer)

lisp/emacs-lisp/faceup.el

@@ -795,7 +795,7 @@ See `faceup-properties' for a list of tracked properties."
       nil
     (if (and (null pos)
              (faceup-has-any-text-property (point-min)))
-        ;; `pos' is `nil' and the character at `point-min' contains a
+        ;; `pos' is nil and the character at `point-min' contains a
         ;; tracked property, return `point-min'.
         (point-min)
       (unless pos

lisp/emacs-lisp/package.el

@@ -1586,7 +1586,7 @@ If the archive version is too new, signal an error."
         (if package
             (package--add-to-archive-contents package archive)
           (lwarn '(package refresh) :warning
-                 "Ignoring `nil' package on `%s' package archive" archive))))))
+                 "Ignoring nil package on `%s' package archive" archive))))))
 
 (defvar package--old-archive-priorities nil
   "Store currently used `package-archive-priorities'.

lisp/emacs-lisp/timer.el

@@ -49,7 +49,7 @@
   function args                         ;What to do when triggered.
   idle-delay                            ;If non-nil, this is an idle-timer.
   psecs
-  ;; A timer may be created with `t' as the TIME, which means that we
+  ;; A timer may be created with t as the TIME, which means that we
   ;; want to run at specific integral multiples of `repeat-delay'.  We
   ;; then have to recompute this (because the machine may have gone to
   ;; sleep, etc).