Drop the annoying need for - for standard input.

* match.c (open_data_source): If there is nothing
in the files array and data is t (indicating a request
to open a data source), then use standard input.
Subject to the compatibility option.

* Makefile (txr-manpage.html): Drop use of
the txr - argument in rule recipe.

* txr.1: Document that - isn't necessary.
Added to compatibility notes.

1 files changed, 9 insertions, 1 deletions

diff --git a/match.c b/match.c
index ef758580..f183c509 100644
--- a/match.c
+++ b/match.c
@@ -4427,7 +4427,15 @@ static void open_data_source(match_files_ctx *c)
       c->data = nil;
     }
   } else if (c->data == t && c->files == nil) {
-    c->data = nil;
+    if (opt_compat && opt_compat <= 170) {
+      c->data = nil;
+    } else {
+      spec_bind (specline, first_spec, c->spec);
+      debuglf(first_spec, lit("opening standard input as data source"), nao);
+      c->curfile = lit("-");
+      c->data = lazy_stream_cons(std_input);
+      c->data_lineno = one;
+    }
   }
 }