Clarify or replace a few \u escapes.

* doc/lispref/nonascii.texi (Character Properties)
More-detailed commentary for \u escapes.
* lisp/progmodes/python.el (python--prettify-symbols-alist):
* lisp/replace.el (query-replace-from-to-separator):
* lisp/textmodes/rst.el (rst-bullets, rst-re-alist-def)
(rst-mode-syntax-table):
* lisp/whitespace.el (whitespace-display-mappings):
Prefer actual character to \u escape when this makes the code
easier to follow in the usual case where Unicode chars can be
displayed.

doc/lispref/nonascii.texi

@@ -583,17 +583,17 @@ This function returns the value of @var{char}'s @var{propname} property.
      @result{} Nd
 @end group
 @group
-;; subscript 4
+;; U+2084 SUBSCRIPT FOUR
 (get-char-code-property ?\u2084 'digit-value)
      @result{} 4
 @end group
 @group
-;; one fifth
+;; U+2155 VULGAR FRACTION ONE FIFTH
 (get-char-code-property ?\u2155 'numeric-value)
      @result{} 0.2
 @end group
 @group
-;; Roman IV
+;; U+2163 ROMAN NUMERAL FOUR
 (get-char-code-property ?\u2163 'numeric-value)
      @result{} 4
 @end group

lisp/progmodes/python.el

@@ -621,9 +621,9 @@ The type returned can be `comment', `string' or `paren'."
     (0 (ignore (python-syntax-stringify))))))
 
 (defconst python--prettify-symbols-alist
-  '(("lambda"  . ?\u03bb)
-    ("and" . ?\u2227)
-    ("or" . ?\u2228)))
+  '(("lambda"  . ?λ)
+    ("and" . ?∧)
+    ("or" . ?∨)))
 
 (defsubst python-syntax-count-quotes (quote-char &optional point limit)
   "Count number of quotes around point (max is 3).

lisp/replace.el

@@ -76,7 +76,7 @@ to the minibuffer that reads the string to replace, or invoke replacements
 from Isearch by using a key sequence like `C-s C-s M-%'." "24.3")
 
 (defcustom query-replace-from-to-separator
-  (propertize (if (char-displayable-p ?\u2192) " \u2192 " " -> ")
+  (propertize (if (char-displayable-p ?→) " → " " -> ")
               'face 'minibuffer-prompt)
   "String that separates FROM and TO in the history of replacement pairs."
   ;; Avoids error when attempt to autoload char-displayable-p fails

lisp/textmodes/rst.el

@@ -296,7 +296,7 @@ in parentheses follows the development revision and the time stamp.")
 ;; syntax.
 (defconst rst-bullets
   ;; Sorted so they can form a character class when concatenated.
-  '(?- ?* ?+ ?\u2022 ?\u2023 ?\u2043)
+  '(?- ?* ?+ ?• ?‣ ?⁃)
   "List of all possible bullet characters for bulleted lists.")
 
 (defconst rst-uri-schemes
@@ -392,8 +392,8 @@ in parentheses follows the development revision and the time stamp.")
 				        ; item tag.
 
     ;; Inline markup (`ilm')
-    (ilm-pfx (:alt "^" hws-prt "[-'\"([{<\u2018\u201c\u00ab\u2019/:]"))
-    (ilm-sfx (:alt "$" hws-prt "[]-'\")}>\u2019\u201d\u00bb/:.,;!?\\]"))
+    (ilm-pfx (:alt "^" hws-prt "[-'\"([{<‘“«’/:]"))
+    (ilm-sfx (:alt "$" hws-prt "[]-'\")}>’”»/:.,;!?\\]"))
 
     ;; Inline markup content (`ilc')
     (ilcsgl-tag "\\S ") ; A single non-white character.
@@ -778,12 +778,12 @@ This inherits from Text mode.")
     (modify-syntax-entry ?\\ "\\" st)
     (modify-syntax-entry ?_ "." st)
     (modify-syntax-entry ?| "." st)
-    (modify-syntax-entry ?\u00ab "." st)
-    (modify-syntax-entry ?\u00bb "." st)
-    (modify-syntax-entry ?\u2018 "." st)
-    (modify-syntax-entry ?\u2019 "." st)
-    (modify-syntax-entry ?\u201c "." st)
-    (modify-syntax-entry ?\u201d "." st)
+    (modify-syntax-entry ?« "." st)
+    (modify-syntax-entry ?» "." st)
+    (modify-syntax-entry ?‘ "." st)
+    (modify-syntax-entry ?’ "." st)
+    (modify-syntax-entry ?“ "." st)
+    (modify-syntax-entry ?” "." st)
     st)
   "Syntax table used while in `rst-mode'.")
 

lisp/whitespace.el

@@ -891,22 +891,22 @@ Used when `whitespace-style' includes `lines' or `lines-tail'."
 ;; Hacked from `visible-whitespace-mappings' in visws.el
 (defcustom whitespace-display-mappings
   '(
-    (space-mark   ?\     [?\u00B7]     [?.])		; space - centered dot
-    (space-mark   ?\xA0  [?\u00A4]     [?_])		; hard space - currency
+    (space-mark   ?\     [?·]     [?.])		; space - middle dot
+    (space-mark   ?\xA0  [?¤]     [?_])		; hard space - currency sign
     ;; NEWLINE is displayed using the face `whitespace-newline'
     (newline-mark ?\n    [?$ ?\n])			; eol - dollar sign
-    ;; (newline-mark ?\n    [?\u21B5 ?\n] [?$ ?\n])	; eol - downwards arrow
-    ;; (newline-mark ?\n    [?\u00B6 ?\n] [?$ ?\n])	; eol - pilcrow
-    ;; (newline-mark ?\n    [?\u00AF ?\n]  [?$ ?\n])	; eol - overscore
-    ;; (newline-mark ?\n    [?\u00AC ?\n]  [?$ ?\n])	; eol - negation
-    ;; (newline-mark ?\n    [?\u00B0 ?\n]  [?$ ?\n])	; eol - degrees
+    ;; (newline-mark ?\n    [?↵ ?\n] [?$ ?\n])	; eol - downwards arrow
+    ;; (newline-mark ?\n    [?¶ ?\n] [?$ ?\n])	; eol - pilcrow
+    ;; (newline-mark ?\n    [?¯ ?\n]  [?$ ?\n])	; eol - overscore
+    ;; (newline-mark ?\n    [?¬ ?\n]  [?$ ?\n])	; eol - negation
+    ;; (newline-mark ?\n    [?° ?\n]  [?$ ?\n])	; eol - degrees
     ;;
     ;; WARNING: the mapping below has a problem.
     ;; When a TAB occupies exactly one column, it will display the
     ;; character ?\xBB at that column followed by a TAB which goes to
     ;; the next TAB column.
     ;; If this is a problem for you, please, comment the line below.
-    (tab-mark     ?\t    [?\u00BB ?\t] [?\\ ?\t])	; tab - left quote mark
+    (tab-mark     ?\t    [?» ?\t] [?\\ ?\t])	; tab - right guillemet
     )
   "Specify an alist of mappings for displaying characters.