nl_tokens: Handle escaped braces : \\ { foo bar }
pl_tokens: function escapeBraces ( str , arr , opts ) { if ( ! / \{[^{]+\{ / . <mask> ( str ) ) { return arr . concat ( str . split ( '\\' ) . join ( '' ) ) ; } else { str = str . split ( '\\{' ) . join ( '__LT_BRACE__' ) ; str = str . split ( '\\}' ) . join ( '__RT_BRACE__' ) ; return map ( braces ( str , arr , opts ) , function ( ele ) { ele = ele . split ( '__LT_BRACE__' ) . join ( '{' ) ; return ele . split ( '__RT_BRACE__' ) . join ( '}' ) ; } ) ; } }