Add help entries for kill, yank, isearch

Change-Id: I13c074a5f67ff9ce3ef5c6819b72507ceadcfd4c

gertty/mywid.py

@@ -30,6 +30,12 @@ GLOBAL_HELP = (
      "Search for changes"),
     (keymap.LIST_HELD,
      "List held changes"),
+    (keymap.KILL,
+     "Kill to end of line (editing)"),
+    (keymap.YANK,
+     "Yank from kill ring (editing)"),
+    (keymap.YANK_POP,
+     "Replace previous yank from kill ring (editing)"),
     )
 
 class TextButton(urwid.Button):

gertty/view/diff.py

@@ -164,6 +164,8 @@ class BaseDiffView(urwid.WidgetWrap):
              "Add an inline comment"),
             (key(keymap.SELECT_PATCHSETS),
              "Select old/new patchsets to diff"),
+            (key(keymap.INTERACTIVE_SEARCH),
+             "Interactive search"),
             ]
 
     def __init__(self, app, new_revision_key):