Spelling fixes

lisp/progmodes/python.el

@@ -2531,7 +2531,7 @@ the python shell:
                     (concat
                      (format "# -*- coding: %s -*-\n" encoding)
                      (make-string
-                      ;; Substract 2 because of the coding cookie.
+                      ;; Subtract 2 because of the coding cookie.
                       (- (line-number-at-pos start) 2) ?\n))))
          (toplevel-block-p (save-excursion
                              (goto-char start)
@@ -3951,7 +3951,7 @@ operator."
 
 (defun python-info-encoding-from-cookie ()
   "Detect current buffer's encoding from its coding cookie.
-Returns the enconding as a symbol."
+Returns the encoding as a symbol."
   (let ((first-two-lines
          (save-excursion
            (save-restriction
@@ -3968,9 +3968,9 @@ Returns the enconding as a symbol."
   "Return encoding for file.
 Try `python-info-encoding-from-cookie', if none is found then
 default to utf-8."
-  ;; If no enconding is defined, then it's safe to use UTF-8: Python 2
+  ;; If no encoding is defined, then it's safe to use UTF-8: Python 2
   ;; uses ASCII as default while Python 3 uses UTF-8.  This means that
-  ;; in the worst case escenario python.el will make things work for
+  ;; in the worst case scenario python.el will make things work for
   ;; Python 2 files with unicode data and no encoding defined.
   (or (python-info-encoding-from-cookie)
       'utf-8))

nt/ChangeLog

@@ -725,7 +725,7 @@
 2012-10-01  Eli Zaretskii  <eliz@gnu.org>
 
 	* preprep.c (RVA_TO_PTR): Use 'unsigned char *' instead of
-	'void *', for pointer arithmetics.
+	'void *', for pointer arithmetic.
 	(OFFSET_TO_RVA, RVA_TO_OFFSET, RVA_TO_SECTION_OFFSET): Enclose all
 	macro arguments in parentheses.
 

src/ChangeLog.10

@@ -2826,7 +2826,7 @@
 2006-07-21  Eli Zaretskii  <eliz@gnu.org>
 	* w32.c (convert_time): Use explicit long double constants to
-	ensure long double arithmetics is used throughout.
+	ensure long double arithmetic is used throughout.
 2006-07-20  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>

src/ChangeLog.12

@@ -2327,7 +2327,7 @@
 2012-12-08  Fabrice Popineau  <fabrice.popineau@gmail.com>
-	* w32fns.c (emacs_abort): Don't do arithmetics on void pointers.
+	* w32fns.c (emacs_abort): Don't do arithmetic on void pointers.
 2012-12-08  Eli Zaretskii  <eliz@gnu.org>
@@ -4716,7 +4716,7 @@
 	defining an XRectangle structure.
 	* w32proc.c (RVA_TO_PTR, w32_executable_type): Fix pointer
-	arithmetics for compatibility with x64.
+	arithmetic for compatibility with x64.
 	* w32menu.c (add_menu_item): Use UINT_PTR instead of UINT, for
 	compatibility with x64.