Fix handling of interpolated if/unless blocks

Resolves "beginless range" error.

Fixes #1308, #1324, #1326, #1327

lib/yard/parser/ruby/ruby_parser.rb

@@ -202,8 +202,7 @@ def on_#{event}(tok)
             begin; undef on_#{event}; rescue NameError; end
             def on_#{event}(tok)
               unless @last_ns_token == [:kw, "def"] ||
-                  (@tokens.last && @tokens.last[0] == :symbeg) ||
-                  (!@newline && %w(if while until unless).include?(tok))
+                  (@tokens.last && @tokens.last[0] == :symbeg)
                 (@map[tok] ||= []) << [lineno, charno]
               end
               visit_ns_token(:#{event}, tok, true)
@@ -442,6 +441,8 @@ def on_const_path_ref(*args)
           module_eval(<<-eof, __FILE__, __LINE__ + 1)
             begin; undef on_#{kw}; rescue NameError; end
             def on_#{kw}(*args)
+              mapping = @map[#{kw.to_s.sub(/_mod$/, '').inspect}]
+              mapping.pop if mapping
               sr = args.last.source_range.first..args.first.source_range.last
               lr = args.last.line_range.first..args.first.line_range.last
               #{node_class}.new(:#{kw}, args, :line => lr, :char => sr)

spec/parser/ruby/ruby_parser_spec.rb

@@ -529,5 +529,15 @@ class B
       eof
       expect(ast.jump(:class).docstring).to eq "comment 1\ncomment 2"
     end
+
+    %w(if unless).each do |type|
+      let(:condition_type) { type }
+      let(:ast) { stmt '"#{' + type + ' condition?; 42; end}" ' + type + ' verbose?' }
+      let(:subject) { ast.jump(:string_embexpr)[0][0].source }
+
+      it "returns correct source for interpolated non-ternary '#{type}' conditionals" do
+        is_expected.to eq "#{condition_type} condition?; 42; end"
+      end
+    end
   end
 end if HAVE_RIPPER