Fix problems caused by new implementation of sub-word mode

* lisp/subr.el (forward-word-strictly, backward-word-strictly):
New functions.
(word-move-empty-char-table): New variable.

* etc/NEWS: Mention 'forward-word-strictly' and
'backward-word-strictly'.

* doc/lispref/positions.texi (Word Motion): Document
'find-word-boundary-function-table', 'forward-word-strictly', and
'backward-word-strictly'.  (Bug#22560)

* src/syntax.c (syms_of_syntax)
<find-word-boundary-function-table>: Doc fix.

* lisp/wdired.el (wdired-xcase-word):
* lisp/textmodes/texnfo-upd.el (texinfo-copy-node-name)
(texinfo-copy-section-title, texinfo-start-menu-description)
(texinfo-copy-menu-title, texinfo-specific-section-type)
(texinfo-insert-node-lines, texinfo-copy-next-section-title):
* lisp/textmodes/texinfo.el (texinfo-clone-environment)
(texinfo-insert-@end):
* lisp/textmodes/texinfmt.el (texinfo-format-scan)
(texinfo-anchor, texinfo-multitable-widths)
(texinfo-multitable-item):
* lisp/textmodes/tex-mode.el (latex-env-before-change):
* lisp/textmodes/flyspell.el (texinfo-mode-flyspell-verify):
* lisp/skeleton.el (skeleton-insert):
* lisp/simple.el (count-words):
* lisp/progmodes/vhdl-mode.el (vhdl-beginning-of-libunit)
(vhdl-beginning-of-defun, vhdl-beginning-of-statement-1)
(vhdl-update-sensitivity-list, vhdl-template-block)
(vhdl-template-break, vhdl-template-case, vhdl-template-default)
(vhdl-template-default-indent, vhdl-template-for-loop)
(vhdl-template-if-then-use, vhdl-template-bare-loop)
(vhdl-template-nature, vhdl-template-procedural)
(vhdl-template-process, vhdl-template-selected-signal-asst)
(vhdl-template-type, vhdl-template-variable)
(vhdl-template-while-loop, vhdl-beginning-of-block)
(vhdl-hooked-abbrev, vhdl-port-copy, vhdl-hs-forward-sexp-func):
* lisp/progmodes/verilog-mode.el (verilog-backward-sexp)
(verilog-forward-sexp, verilog-beg-of-statement)
(verilog-set-auto-endcomments, verilog-backward-token)
(verilog-do-indent):
* lisp/progmodes/vera-mode.el (vera-guess-basic-syntax)
(vera-indent-block-closing):
* lisp/progmodes/simula.el (simula-context)
(simula-backward-up-level, simula-forward-down-level)
(simula-previous-statement, simula-next-statement)
(simula-skip-comment-backward, simula-calculate-indent)
(simula-find-if, simula-electric-keyword):
* lisp/progmodes/sh-script.el (sh-smie--rc-newline-semi-p):
* lisp/progmodes/ruby-mode.el (ruby-smie--redundant-do-p)
(ruby-smie--forward-token, ruby-smie--backward-token)
(ruby-singleton-class-p, ruby-calculate-indent)
(ruby-forward-sexp, ruby-backward-sexp):
* lisp/progmodes/ps-mode.el (ps-run-goto-error):
* lisp/progmodes/perl-mode.el (perl-syntax-propertize-function)
(perl-syntax-propertize-special-constructs)
(perl-backward-to-start-of-continued-exp):
* lisp/progmodes/pascal.el (pascal-indent-declaration):
* lisp/progmodes/octave.el (octave-function-file-p):
* lisp/progmodes/mantemp.el (mantemp-insert-cxx-syntax):
* lisp/progmodes/js.el (js--forward-function-decl):
* lisp/progmodes/idlwave.el (idlwave-show-begin-check)
(idlwave-beginning-of-block, idlwave-end-of-block)
(idlwave-block-jump-out, idlwave-determine-class):
* lisp/progmodes/icon.el (icon-is-continuation-line)
(icon-backward-to-start-of-continued-exp, end-of-icon-defun):
* lisp/progmodes/hideif.el (hide-ifdef-define):
* lisp/progmodes/f90.el (f90-change-keywords):
* lisp/progmodes/cperl-mode.el (cperl-electric-pod)
(cperl-linefeed, cperl-electric-terminator)
(cperl-find-pods-heres, cperl-fix-line-spacing)
(cperl-invert-if-unless):
* lisp/progmodes/cc-engine.el (c-forward-<>-arglist-recur):
* lisp/progmodes/cc-align.el (c-lineup-java-inher):
* lisp/progmodes/ada-mode.el (ada-compile-goto-error)
(ada-adjust-case-skeleton, ada-create-case-exception)
(ada-create-case-exception-substring)
(ada-case-read-exceptions-from-file, ada-after-keyword-p)
(ada-scan-paramlist, ada-get-current-indent, ada-get-indent-end)
(ada-get-indent-if, ada-get-indent-block-start)
(ada-get-indent-loop, ada-get-indent-type)
(ada-search-prev-end-stmt, ada-check-defun-name)
(ada-goto-decl-start, ada-goto-matching-start)
(ada-goto-matching-end, ada-looking-at-semi-or)
(ada-looking-at-semi-private, ada-in-paramlist-p)
(ada-search-ignore-complex-boolean, ada-move-to-start)
(ada-move-to-end, ada-which-function, ada-gen-treat-proc):
* lisp/net/quickurl.el (quickurl-grab-url):
* lisp/mail/sendmail.el (mail-do-fcc):
* lisp/mail/rmail.el (rmail-resend):
* lisp/mail/mailabbrev.el (mail-abbrev-complete-alias):
* lisp/mail/mail-extr.el (mail-extract-address-components):
* lisp/json.el (json-read-keyword):
* lisp/files.el (insert-directory):
* lisp/emacs-lisp/checkdoc.el (checkdoc-this-string-valid-engine):
* lisp/completion.el (symbol-under-point, symbol-before-point)
(symbol-before-point-for-complete, next-cdabbrev)
(add-completions-from-c-buffer):
* lisp/cedet/semantic/texi.el (semantic-up-context)
(semantic-beginning-of-context):
* lisp/cedet/semantic/bovine/el.el (semantic-get-local-variables):
use 'forward-word-strictly' and 'backward-word-strictly' instead
of 'forward-word' and 'backward-word'.

[This reapplies commit c1d32a6537,
which was inadvertently lost by merge commit
c71e7cc113.]

lisp/progmodes/verilog-mode.el

@@ -3470,7 +3470,7 @@ Use filename, if current buffer being edited shorten to just buffer name."
 	(found nil)
 	(st (point)))
     (if (not (looking-at "\\<"))
-	(forward-word -1))
+	(forward-word-strictly -1))
     (cond
      ((verilog-skip-backward-comment-or-string))
      ((looking-at "\\<else\\>")
@@ -3522,7 +3522,7 @@ Use filename, if current buffer being edited shorten to just buffer name."
 	(st (point))
 	(nest 'yes))
     (if (not (looking-at "\\<"))
-	(forward-word -1))
+	(forward-word-strictly -1))
     (cond
      ((verilog-skip-forward-comment-or-string)
       (verilog-forward-syntactic-ws))
@@ -3545,11 +3545,11 @@ Use filename, if current buffer being edited shorten to just buffer name."
 	       (and (looking-at "fork")
 		    (progn
                       (setq here (point))  ; sometimes a fork is just a fork
-		      (forward-word -1)
+		      (forward-word-strictly -1)
 		      (looking-at verilog-disable-fork-re))))
               (progn  ; it is a disable fork; ignore it
 		(goto-char (match-end 0))
-		(forward-word 1)
+		(forward-word-strictly 1)
 		(setq reg nil))
             (progn  ; it is a nice simple fork
               (goto-char here)   ; return from looking for "disable fork"
@@ -3599,7 +3599,7 @@ Use filename, if current buffer being edited shorten to just buffer name."
         ;; Search forward for matching endclocking
         (setq reg "\\(\\<clocking\\>\\)\\|\\(\\<endclocking\\>\\)" )))
       (if (and reg
-	       (forward-word 1))
+	       (forward-word-strictly 1))
 	  (catch 'skip
 	    (if (eq nest 'yes)
 		(let ((depth 1)
@@ -3618,7 +3618,7 @@ Use filename, if current buffer being edited shorten to just buffer name."
 			     (looking-at verilog-disable-fork-re)
 			     (and (looking-at "fork")
 				  (progn
-				    (forward-word -1)
+				    (forward-word-strictly -1)
 				    (looking-at verilog-disable-fork-re))))
                             (progn  ; it is a disable fork; another false alarm
 			      (goto-char (match-end 0)))
@@ -4292,7 +4292,7 @@ Uses `verilog-scan' cache."
 	      ;; stop if we see a named coverpoint
 	      (looking-at "\\w+\\W*:\\W*\\(coverpoint\\|cross\\|constraint\\)")
 	      ;; keep going if we are in the middle of a word
-	      (not (or (looking-at "\\<") (forward-word -1)))
+	      (not (or (looking-at "\\<") (forward-word-strictly -1)))
 	      ;; stop if we see an assertion (perhaps labeled)
 	      (and
 	       (looking-at "\\(\\w+\\W*:\\W*\\)?\\(\\<\\(assert\\|assume\\|cover\\)\\>\\s-+\\<property\\>\\)\\|\\(\\<assert\\>\\)")
@@ -4841,7 +4841,7 @@ primitive or interface named NAME."
 
                              ((looking-at "\\<end\\>")
                               ;; HERE
-                              (forward-word 1)
+                              (forward-word-strictly 1)
                               (verilog-forward-syntactic-ws)
                               (setq err nil)
                               (setq str (verilog-get-expr))
@@ -5956,7 +5956,7 @@ Set point to where line starts."
       (verilog-backward-up-list 1)
       (verilog-backward-syntactic-ws)
       (let ((back (point)))
-	(forward-word -1)
+	(forward-word-strictly -1)
 	(cond
 	 ;;XX
 	 ((looking-at "\\<\\(always\\(_latch\\|_ff\\|_comb\\)?\\|case\\(\\|[xz]\\)\\|for\\(\\|each\\|ever\\)\\|i\\(f\\|nitial\\)\\|repeat\\|while\\)\\>")
@@ -5997,11 +5997,11 @@ Set point to where line starts."
 
    (;-- any of begin|initial|while are complete statements; 'begin : foo' is also complete
     t
-    (forward-word -1)
+    (forward-word-strictly -1)
     (while (or (= (preceding-char) ?\_)
                (= (preceding-char) ?\@)
                (= (preceding-char) ?\.))
-      (forward-word -1))
+      (forward-word-strictly -1))
     (cond
      ((looking-at "\\<else\\>")
       t)
@@ -6515,7 +6515,7 @@ Only look at a few lines to determine indent level."
 				  (= (following-char) ?\`))
 			     (progn
 			       (forward-char 1)
-			       (forward-word 1)
+			       (forward-word-strictly 1)
 			       (skip-chars-forward " \t")))
 			    ((= (following-char) ?\[)
 			     (progn