peg.ebnf: Rename EBNF< to EBNF-MAIN{{

language/cpu/8080/emulator/emulator.factor

@@ -761,15 +761,15 @@ SYMBOLS: $1 $2 $3 $4 ;
     ! is the getter word for that register with stack effect
     ! ( cpu -- value ). The second item is the setter word with
     ! stack effect ( value cpu -- ).
-    EBNF<
+    EBNF-MAIN{{
         main=("A" | "B" | "C" | "D" | "E" | "H" | "L") => [[ register-lookup ]]
-    EBNF> ;
+    }} ;
 
 : all-flags ( -- parser )
     ! A parser for 16-bit flags.
-    EBNF<
+    EBNF-MAIN{{
         main=("NZ" | "NC" | "PO" | "PE" | "Z" | "C" | "P" | "M") => [[ flag-lookup ]]
-    EBNF> ;
+    }} ;
 
 : 16-bit-registers ( -- parser )
     ! A parser for 16-bit registers. On a successfull parse the
@@ -777,9 +777,9 @@ SYMBOLS: $1 $2 $3 $4 ;
     ! is the getter word for that register with stack effect
     ! ( cpu -- value ). The second item is the setter word with
     ! stack effect ( value cpu -- ).
-    EBNF<
+    EBNF-MAIN{{
         main=("AF" | "BC" | "DE" | "HL" | "SP") => [[ register-lookup ]]
-    EBNF> ;
+    }} ;
 
 : all-registers ( -- parser )
     ! Return a parser that can parse the format

language/peg/ebnf/ebnf-tests.factor

@@ -507,7 +507,7 @@ foo=<foreign any-char> 'd'
 ] unit-test
 
 [
-  "USING: peg.ebnf ; EBNF< foo='a' foo='b' EBNF>" eval( -- ) drop
+  "USING: peg.ebnf ; EBNF-MAIN{{ foo='a' foo='b' }}" eval( -- ) drop
 ] must-fail
 
 { t } [

language/peg/ebnf/ebnf.factor

@@ -537,8 +537,13 @@ ERROR: could-not-parse-ebnf ;
 
 PRIVATE>
 
-SYNTAX: \ EBNF<
-    "EBNF>"
+SYNTAX: \ EBNF-MAIN{{
+    "}}"
+    reset-tokenizer parse-multiline-string parse-ebnf main of
+    suffix! reset-tokenizer ;
+
+SYNTAX: \ EBNF-MAIN((
+    "))"
     reset-tokenizer parse-multiline-string parse-ebnf main of
     suffix! reset-tokenizer ;
 
@@ -547,6 +552,11 @@ SYNTAX: \ EBNF{{
     reset-tokenizer parse-multiline-string ebnf>quot nip
     suffix! \ call suffix! reset-tokenizer ;
 
+SYNTAX: \ EBNF((
+    "))"
+    reset-tokenizer parse-multiline-string ebnf>quot nip
+    suffix! \ call suffix! reset-tokenizer ;
+
 SYNTAX: \ EBNF:
     reset-tokenizer scan-new-word dup "EBNF;" parse-multiline-string
     ebnf>quot swapd