support the ::S anchored search (string comparison) command (and ::FD, ::FR, ::FS as well)

* The colon modifier can now occur 2 times.
  Specifying `@` more than once or `:` more than twice is an error now.
* Commands do not check for excess colon modifiers - almost every command would have
  to check it. Instead, a double colon will simply behave like a single colon on most
  commands.
* All search commands inherit the anchored semantics, but it's not very useful in some combinations
  like -::S, ::N or ::FK.
  That's why the `::` variants are not documented everywhere.
* The lexer.checkheader macro could be simplified and should also be faster now,
  speeding up startup.
  Eventually this macro can be made superfluous, e.g. by using 1:FB or 0,1^Q::S.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/glob.c b/src/glob.c
index a69aa81..e338975 100644
--- a/src/glob.c
+++ b/src/glob.c
@@ -466,7 +466,7 @@ teco_state_glob_filename_done(teco_machine_main_t *ctx, const teco_string_t *str
 	GFileTest file_flags = G_FILE_TEST_EXISTS;
 
 	gboolean matching = FALSE;
-	gboolean colon_modified = teco_machine_main_eval_colon(ctx);
+	gboolean colon_modified = teco_machine_main_eval_colon(ctx) > 0;
 
 	teco_int_t teco_test_mode;