JBEHAVE-1337 Fix JBehave Grammar expressed in EBNF
JBEHAVE-1337 Fix JBehave Grammar expressed in EBNF

The changes are provided by Reinhold Bihler

valfirst/jbehave-core,valfirst/jbehave-core,gmandnepr/jbehave-core,jbehave/jbehave-core,jbehave/jbehave-core,skundrik/jbehave-core,valfirst/jbehave-core,jbehave/jbehave-core,jbehave/jbehave-core,valfirst/jbehave-core,skundrik/jbehave-core,skundrik/jbehave-core,gmandnepr/jbehave-core,gmandnepr/jbehave-core