Merge branch 'masked-variables-docs-update' into 'master'

Clarify masked variable message, add docs link

See merge request gitlab-org/gitlab-ce!27156

app/views/ci/variables/_variable_row.html.haml

@@ -33,7 +33,9 @@
         name: value_input_name,
         placeholder: s_('CiVariables|Input variable value') }
         = value
-      %p.masking-validation-error.gl-field-error.hide= s_("CiVariables|This variable will not be masked")
+      %p.masking-validation-error.gl-field-error.hide
+        = s_("CiVariables|Cannot use Masked Variable with current value")
+        = link_to icon('question-circle'), help_page_path('ci/variables/README', anchor: 'masked-variables'), target: '_blank', rel: 'noopener noreferrer'
     - unless only_key_value
       .ci-variable-body-item.ci-variable-protected-item
         .append-right-default

locale/gitlab.pot

@@ -1833,6 +1833,9 @@ msgstr ""
 msgid "CiStatus|running"
 msgstr ""
 
+msgid "CiVariables|Cannot use Masked Variable with current value"
+msgstr ""
+
 msgid "CiVariables|Input variable key"
 msgstr ""
 
@@ -1842,9 +1845,6 @@ msgstr ""
 msgid "CiVariables|Remove variable row"
 msgstr ""
 
-msgid "CiVariables|This variable will not be masked"
-msgstr ""
-
 msgid "CiVariable|* (All environments)"
 msgstr ""