Fix the documentation for the AST of ForStatement
Fix the documentation for the AST of ForStatement

Fix #1777
Closes gh-1788

ariya/esprima,jquery/esprima,ariya/esprima,ChromeDevTools/esprima,jquery/esprima,ChromeDevTools/esprima,ariya/esprima,jquery/esprima,ChromeDevTools/esprima