Expunge "allow" + infinitive from source and doc, part 2.

Do the same for "permit", "enable", "prevent", and (where appropriate)
"require".

doc/misc/reftex.texi:
doc/misc/url.texi:
lib/get-permissions.c:
lib/strftime.c:
lisp/org/org-element.el:
lisp/org/org-mobile.el:
lisp/textmodes/reftex-vars.el:
src/bidi.c:
src/emacs.c:
src/xdisp.c:
test/etags/c-src/emacs/src/lisp.h:

Expunge the likes of "This allows to do something" from the above files.

doc/misc/reftex.texi

@@ -5213,7 +5213,7 @@ mouse    @r{Highlighting is mouse driven.}
 both     @r{Both cursor and mouse trigger highlighting.}
 @end example
 
-Changing this variable requires to rebuild the selection and *toc*
+Changing this variable requires rebuilding the selection and *toc*
 buffers to become effective (keys @kbd{g} or @kbd{r}).
 @end defopt
 

doc/misc/url.texi

@@ -423,7 +423,7 @@ the directory specified by @code{url-configuration-directory}.
 @end defopt
 
 @defopt url-cookie-confirmation
-Specifies whether confirmation is require to accept cookies.
+Specifies whether confirmation is required to accept cookies.
 @end defopt
 
 @defopt url-cookie-multiple-line

lib/get-permissions.c

@@ -102,7 +102,7 @@ get_permissions (const char *name, int desc, mode_t mode,
      There is an API
        pathconf (name, _PC_ACL_ENABLED)
        fpathconf (desc, _PC_ACL_ENABLED)
-     that allows to determine which of the two kinds of ACLs is supported
+     that allows us to determine which of the two kinds of ACLs is supported
      for the given file.  But some file systems may implement this call
      incorrectly, so better not use it.
      When fetching the source ACL, we simply fetch both ACL types.

lib/strftime.c

@@ -641,7 +641,7 @@ strftime_case_ (bool upcase, STREAM_OR_CHAR_T *s,
           break;
         }
 
-      /* As a GNU extension we allow to specify the field width.  */
+      /* As a GNU extension we allow the field width to be specified.  */
       if (ISDIGIT (*f))
         {
           width = 0;

lisp/org/org-element.el

@@ -487,7 +487,7 @@ Return parent element."
 ;; cannot contain other greater elements of their own type.
 ;;
 ;; Beside implementing a parser and an interpreter, adding a new
-;; greater element requires to tweak `org-element--current-element'.
+;; greater element requires tweaking `org-element--current-element'.
 ;; Moreover, the newly defined type must be added to both
 ;; `org-element-all-elements' and `org-element-greater-elements'.
 

lisp/org/org-mobile.el

@@ -88,7 +88,7 @@ org-agenda-text-search-extra-files
 Encryption uses AES-256, with a password given in
 `org-mobile-encryption-password'.
 When nil, plain files are kept on the server.
-Turning on encryption requires to set the same password in the MobileOrg
+Turning on encryption requires setting the same password in the MobileOrg
 application.  Before turning this on, check of MobileOrg does already
 support it - at the time of this writing it did not yet."
   :group 'org-mobile

lisp/textmodes/reftex-vars.el

@@ -1905,7 +1905,7 @@ instead or as well.  The variable may have one of these values:
    mouse    Highlighting is mouse driven.
    both     Both cursor and mouse trigger highlighting.
 
-Changing this variable requires to rebuild the selection and *toc* buffers
+Changing this variable requires rebuilding the selection and *toc* buffers
 to become effective (keys `g' or `r')."
   :group 'reftex-fontification-configurations
   :type '(choice

src/bidi.c

@@ -3001,7 +3001,7 @@ bidi_resolve_neutral (struct bidi_it *bidi_it)
 	{
 	  /* Arrrgh!!  The UAX#9 algorithm is too deeply entrenched in
 	     the assumption of batch-style processing; see clauses W4,
-	     W5, and especially N1, which require to look far forward
+	     W5, and especially N1, which require looking far forward
 	     (as well as back) in the buffer/string.  May the fleas of
 	     a thousand camels infest the armpits of those who design
 	     supposedly general-purpose algorithms by looking at their

src/emacs.c

@@ -2188,7 +2188,7 @@ synchronize_locale (int category, Lisp_Object *plocale, Lisp_Object desired_loca
     {
       *plocale = desired_locale;
 #ifdef WINDOWSNT
-      /* Changing categories like LC_TIME usually requires to specify
+      /* Changing categories like LC_TIME usually requires specifying
 	 an encoding suitable for the new locale, but MS-Windows's
 	 'setlocale' will only switch the encoding when LC_ALL is
 	 specified.  So we ignore CATEGORY, use LC_ALL instead, and

src/xdisp.c

@@ -13139,7 +13139,7 @@ text_outside_line_unchanged_p (struct window *w,
 	 beginning of a paragraph, before the first strong directional
 	 character, can change the base direction of the paragraph (unless
 	 the buffer specifies a fixed paragraph direction), which will
-	 require to redisplay the whole paragraph.  It might be worthwhile
+	 require redisplaying the whole paragraph.  It might be worthwhile
 	 to find the paragraph limits and widen the range of redisplayed
 	 lines to that, but for now just give up this optimization.  */
       if (!NILP (BVAR (XBUFFER (w->contents), bidi_display_reordering))
@@ -18067,7 +18067,7 @@ try_window_id (struct window *w)
      beginning of a paragraph, before the first strong directional
      character, can change the base direction of the paragraph (unless
      the buffer specifies a fixed paragraph direction), which will
-     require to redisplay the whole paragraph.  It might be worthwhile
+     require redisplaying the whole paragraph.  It might be worthwhile
      to find the paragraph limits and widen the range of redisplayed
      lines to that, but for now just give up this optimization and
      redisplay from scratch.  */

test/etags/c-src/emacs/src/lisp.h

@@ -2005,7 +2005,7 @@ struct Lisp_Marker
   /* For markers that point somewhere,
      this is used to chain of all the markers in a given buffer.  */
   /* We could remove it and use an array in buffer_text instead.
-     That would also allow to preserve it ordered.  */
+     That would also allow us to preserve it ordered.  */
   struct Lisp_Marker *next;
   /* This is the char position where the marker points.  */
   ptrdiff_t charpos;