introduced true block and EOL comments

* The previous convention of !* ... *! are now true block comments,
  i.e. they are parsed faster, don't spam the goto table and allow
  embedding of exclamation marks - only "*!" terminates the comment.
* It is therefore now forbidden to have goto labels beginning with "*".
* Also support "!!" to introduce EOL comments (like C++'s //).
  This disallows empty labels, but they weren't useful anyway.
  This is the shortest way to begin a comment.
* All comment labels have been converted to true comments, to ensure
  that syntax highlighting works correctly.
  EOL comments are used for single line commented-out code, since it's
  easiest to uncomment - you don't have to jump to the line end.
  This is a pure convention / coding style.
  Other people might do it differently.
* It's of course still possible to abuse goto labels as comments
  as TECO did for ages.
* In lexing / syntax highlighting, labels and comments are highlighted differently.
* When syntax highlighting, a single "!" will first be highlighted as a label
  since it's not yet unambiguous. Once you type the second character (* or !),
  the first character is retroactively styled as a comment as well.

1 files changed, 11 insertions, 11 deletions

diff --git a/lib/lexers/xml.tes b/lib/lexers/xml.tes
index 87ed9b7..081c2ec 100644
--- a/lib/lexers/xml.tes
+++ b/lib/lexers/xml.tes
@@ -1,4 +1,4 @@
-! Lexing for XML and its applications !
+!* Lexing for XML and its applications *!
 
 @[lexer.test.xml]{
   :EN*.xmlQ*"S -1 '
@@ -16,20 +16,20 @@
 @[lexer.set.xml]{
   ESSETILEXERxml
   0ESSETKEYWORDS 
-  ! DTD keywords !
+  !* DTD keywords *!
   5ESSETKEYWORDS
     ELEMENT DOCTYPE ATTLIST ENTITY NOTATION
-  :M[color.keyword],1M[color.set] ! Tags !
-  :M[color.keyword],2M[color.set] ! Tags !
-  :M[color.variable],3M[color.set] ! Attributes !
-  :M[color.variable],4M[color.set] ! Attributes !
+  :M[color.keyword],1M[color.set] !* Tags *!
+  :M[color.keyword],2M[color.set] !* Tags *!
+  :M[color.variable],3M[color.set] !* Attributes *!
+  :M[color.variable],4M[color.set] !* Attributes *!
   :M[color.number],5M[color.set]
   :M[color.string],6M[color.set]
   :M[color.string],7M[color.set]
   :M[color.comment],9M[color.set]
-  :M[color.preproc],10M[color.set] ! Entities !
-  :M[color.keyword],11M[color.set] ! Tag Ends /> !
-  :M[color.preproc2],12M[color.set] ! PI !
-  :M[color.preproc2],13M[color.set] ! PI !
-  :M[color.string2],14M[color.set] ! CDATA !
+  :M[color.preproc],10M[color.set] !* Entities *!
+  :M[color.keyword],11M[color.set] !* Tag Ends /> *!
+  :M[color.preproc2],12M[color.set] !* PI *!
+  :M[color.preproc2],13M[color.set] !* PI *!
+  :M[color.string2],14M[color.set] !* CDATA *!
 }