Add minor corrections related to config of runner

app/views/projects/runners/_form.html.haml

 = form_for runner, url: runner_form_url, html: { class: 'form-horizontal' } do |f|
+  = form_errors(@runner)
   .form-group
     = label :active, "Active", class: 'control-label'
     .col-sm-10
@@ -10,7 +11,7 @@
     .col-sm-10
       .checkbox
         = f.check_box :run_untagged
-        %span.light This runner can pick jobs without tags
+        %span.light Indicates whether runner can pick jobs without tags
   .form-group
     = label_tag :token, class: 'control-label' do
       Token

app/views/projects/runners/edit.html.haml

@@ -2,7 +2,5 @@
 
 %h4 Runner ##{@runner.id}
 
-= form_errors(@runner)
-
 %hr
  = render 'form', runner: @runner, runner_form_url: runner_path(@runner)

doc/ci/runners/README.md

@@ -127,9 +127,9 @@ the appropriate dependencies to run Rails test suites.
 
 ### Prevent runner with tags from picking jobs without tags
 
-You can configure runner to prevent it from picking jobs with tags when
-runnner does not have tags assigned. This configuration setting is available
-in GitLab interface when editting runner details.
+You can configure a runner to prevent it from picking jobs with tags when
+the runnner does not have tags assigned. This setting is available on each
+runner in *Project Settings* > *Runners*.
 
 ### Be careful with sensitive information
 

lib/ci/api/runners.rb

@@ -32,7 +32,7 @@ module Ci
                          tag_list: params[:tag_list] }
 
           unless params[:run_untagged].nil?
-            attributes.merge!(run_untagged: params[:run_untagged])
+            attributes[:run_untagged] = params[:run_untagged]
           end
 
           runner =