first cut argument list completion suggestions

pkg/analysis_server/doc/api.html

Index: pkg/analysis_server/doc/api.html
diff --git a/pkg/analysis_server/doc/api.html b/pkg/analysis_server/doc/api.html
index d029594e023ff9941ef74947497911c6dee49f2a..a1372daec7ac4fb08409940d943447e7b15def4f 100644
--- a/pkg/analysis_server/doc/api.html
+++ b/pkg/analysis_server/doc/api.html
@@ -2106,7 +2106,15 @@ dt.typeDefinition {
           in a completion suggestion.
         </p>
         
-      <dl><dt class="value">ARGUMENT_LIST</dt><dt class="value">IMPORT</dt><dt class="value">IDENTIFIER</dt><dd>
+      <dl><dt class="value">ARGUMENT_LIST</dt><dd>
+          
+            <p>
+              A list of arguments for the method or function that is being invoked.
+              For this suggestion kind, the completion field is a textual representation
+              of the invocation and the parameterNames, parameterTypes, and requiredParameterCount
+              attributes are defined.
+            </p>
+          </dd><dt class="value">IMPORT</dt><dt class="value">IDENTIFIER</dt><dd>
             
             <p>
               The element identifier should be inserted at the completion location.