[orca] Use Unicode in translatable strings

[Joanmarie Diggs <joanied src gnome org>]

commit 860e86eeb9d3947b1a23acc8bfce0bf59d9dc0a7
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Nov 6 14:19:05 2016 +0100

    Use Unicode in translatable strings
    
    See https://developer.gnome.org/hig/stable/typography.html

 src/orca/messages.py |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/orca/messages.py b/src/orca/messages.py
index 09d0619..31853fa 100644
--- a/src/orca/messages.py
+++ b/src/orca/messages.py
@@ -211,7 +211,7 @@ CLI_SETTINGS_MANAGER_ERROR = \
 # Orca, but Orca is already running.
 CLI_OTHER_ORCAS_ERROR = \
     _('Another screen reader process is already running for this ' \
-      'session.\nRun "orca --replace" to replace that ' \
+      'session.\nRun “orca --replace” to replace that ' \
       'process with a new one.')
 
 # Translators: This string indicates to the user what should be provided when
@@ -1028,9 +1028,9 @@ LEARN_MODE_START_BRAILLE = _("Learn mode.  Press escape to exit.")
 # Mode.
 LEARN_MODE_START_SPEECH = \
     _("Entering learn mode.  Press any key to hear its function.  " \
-      "To view the screen reader's documentation, press F1. " \
-      "To get a list of the screen reader's default shortcuts, press F2. " \
-      "To get a list of the screen reader's shortcuts for the current application, " \
+      "To view the screen reader’s documentation, press F1. " \
+      "To get a list of the screen reader’s default shortcuts, press F2. " \
+      "To get a list of the screen reader’s shortcuts for the current application, " \
       "press F3. " \
       "To exit learn mode, press the escape key.")