From 333a6a8051b83983e8b4236abea32c7ae4dcc811 2018-02-20 03:06:48
From: Shailyn javier Ortiz jimenez <sortiz@intellisys.com.do>
Date: 2018-02-20 03:06:48
Subject: [PATCH] Applying feedbacks - changing enable_history_search from an envvar to a configurable

---

diff --git a/IPython/terminal/interactiveshell.py b/IPython/terminal/interactiveshell.py
index 5ad6640..fcad8ed 100644
--- a/IPython/terminal/interactiveshell.py
+++ b/IPython/terminal/interactiveshell.py
@@ -206,6 +206,10 @@ class TerminalInteractiveShell(InteractiveShell):
              "may be changed or removed in later releases."
     ).tag(config=True)
 
+    enable_history_search = Bool(True,
+        help="Allows to enable/disable the prompt toolkit history search"
+    ).tag(config=True)
+
     @observe('term_title')
     def init_term_title(self, change=None):
         # Enable or disable the terminal title.
@@ -269,11 +273,7 @@ class TerminalInteractiveShell(InteractiveShell):
                             history=history,
                             completer=IPythonPTCompleter(shell=self,
                                                     patch_stdout=patch_stdout),
-                            enable_history_search=(
-                                os.environ['enable_history_search'].capitalize()
-                                if 'enable_history_search' in os.environ
-                                else True
-                            ),
+                            enable_history_search=self.enable_history_search,
                             style=self.style,
                             mouse_support=self.mouse_support,
                             **self._layout_options()