Add explicit alias for h -> help instead of relying on the order of lookup.

Author: DavidSpickett

lldb/source/Interpreter/CommandInterpreter.cpp

@@ -508,6 +508,11 @@ void CommandInterpreter::Initialize() {
   if (cmd_obj_sp) {
     AddAlias("history", cmd_obj_sp);
   }
+
+  cmd_obj_sp = GetCommandSPExact("help");
+  if (cmd_obj_sp) {
+    AddAlias("h", cmd_obj_sp);
+  }
 }
 
 void CommandInterpreter::Clear() {

lldb/test/API/functionalities/abbreviation/TestAbbreviations.py

@@ -20,8 +20,7 @@ def test_command_abbreviations_and_aliases(self):
         self.assertTrue(result.Succeeded())
         self.assertEqual("apropos script", result.GetOutput())
 
-        # "h" could be "help" or "history", "he" can only be "help".
-        command_interpreter.ResolveCommand("he", result)
+        command_interpreter.ResolveCommand("h", result)
         self.assertTrue(result.Succeeded())
         self.assertEqual("help", result.GetOutput())