harmonized all word-movement and deletion commands: they move/delete until the beginning of words now

* All commands and their documentations were inconsistent.
  * ^W rubbed out to the beginning of words.
  * Shift+Right (fnkeys.tes) moved to the beginning of the next word if
    invoked at the beginning of a word and to the end of the next word otherwise.
  * <W> (and <V> and <Y> by extension) moved to the end of the next word.
  * The cheat sheet would claim that <W> moves to the beginning of the next word.
* Video TECO's <W> command would differ again from everything else.
  With positive arguments, it moved to the beginning of words, while
  with negative it moved to end of words.
  I decided not to copy this behavior.
* It has been decided to adopt a consistent beginning-of-words policy.
  -W therefore differs from Video TECO in moving to the beginning of the
  current or previous word.
* teco_find_words() is now based on parsing the document pointer, instead
  of relying on SCI_WORDENDPOSITION, since the latter cannot actually be
  used to skip strictly non-word characters.
  This requires a constant amount of Scintilla messages but will require fewer
  messages only when moving for more than 3 words.
* The semantics of <W> are therefore now consistent with Vim and Emacs as well.
* Shift+Right/Left is still based on SCI_WORDENDPOSITION, so it's behavior
  differs slightly from <W> for instance at the end of lines, as it will
  stop at linebreaks.
* Unfortunately, these changes will break lots of macros, among others
  the M#rf, M#sp and git.blame macros ("Useful macros" from the wiki).

2 files changed, 5 insertions, 4 deletions

diff --git a/doc/grosciteco.tes b/doc/grosciteco.tes
index e5be8a9..f1d7830 100755
--- a/doc/grosciteco.tes
+++ b/doc/grosciteco.tes
@@ -135,7 +135,7 @@ EBN[input]
     !cmd.xF!
       L F<
     !cmd.xX!
-      :M#sw .(W).X.w
+      :M#sw .,1,.ESSCI_WORDENDPOSITIONX.w
       Ocmd.xXQ.w
       !cmd.xXsciteco_topic!
         !*
@@ -272,7 +272,7 @@ EBN[input]
   !cmd.C!
     :M#sw 0A-^^u"=
       !* FIXME: This can be CuXXXX_XXXX (decomposed, e.g. for cyrillic й) *!
-      C 16 \U.w  W
+      C 16 \U.w  LR
     |
       .(:M#sa).X.w 0Q[glyphs.Q.w]U.w
     '
diff --git a/doc/sciteco.7.template b/doc/sciteco.7.template
index b274715..30f53ba 100644
--- a/doc/sciteco.7.template
+++ b/doc/sciteco.7.template
@@ -503,10 +503,11 @@ Non-empty string arguments
 .br
 (modifier \fIdisabled\fP)
 T};T{
-Rub out last word according to Scintilla's definition of a word
+Rub out to beginning of last word according to Scintilla's definition of a word
 as set by
 .SCITECO_TOPIC SCI_SETWORDCHARS
-.BR SCI_SETWORDCHARS .
+.BR SCI_SETWORDCHARS ,
+analogous to \fBY\fP command.
 T}
 \^;\^;\^;T{
 Miscelleaneous