Handle right hand assignment

lsegal#1434

lib/yard/parser/ruby/ast_node.rb

@@ -271,7 +271,7 @@ def has_line?
 
         # @return [Fixnum] the starting line number of the node
         def line
-          line_range && line_range.first
+          line_range && line_range.begin || 1
         end
 
         # @return [String] the first line of source represented by the node.
@@ -345,8 +345,8 @@ def reset_line_info
           elsif !children.empty?
             f = children.first
             l = children.last
-            self.line_range = Range.new(f.line_range.first, l.line_range.last)
-            self.source_range = Range.new(f.source_range.first, l.source_range.last)
+            self.line_range = Range.new(f.line_range.begin || 1, l.line_range.last)
+            self.source_range = Range.new(f.source_range.begin || 1, l.source_range.last)
           elsif @fallback_line || @fallback_source
             self.line_range = @fallback_line
             self.source_range = @fallback_source