Forbid line-break before =, make white-space around it optional

stasm · stasm · commit 17b4df82115b · 2017-02-23T18:48:20.000+01:00
diff --git a/syntax/fluent.ebnf b/syntax/fluent.ebnf
@@ -38,7 +38,7 @@ attribute            ::= NL __ '.' identifier value
 attribute-list       ::= attribute+
 
 message              ::= identifier (value attribute-list? | attribute-list)
-value                ::= __ '=' __ pattern
+value                ::= _? '=' __? pattern
 pattern              ::= (text | placeable)+
 text                 ::= ((char - line-break) - special | break-indent | '\' special)+
 quoted-text          ::= '"' (text | '\"')+ '"'
