From c5c1a0cba5f3f03bac7b88655c01da7c42d4d3fe Mon Sep 17 00:00:00 2001
From: castany <castany@clevo>
Date: Sun, 25 Mar 2018 17:50:40 +0200
Subject: [PATCH] Change hardcoded brackets for Toolbar message

Remove the brackets that were harcoded in methods NavigationToolbar2.mouse_move() and ToolCursorPosition.send_message(). Move them rather to the method Artist.format_cursor_data(), because that method that can easily be overwritten.
---
 lib/matplotlib/artist.py        | 5 +++--
 lib/matplotlib/backend_bases.py | 4 +++-
 lib/matplotlib/backend_tools.py | 4 +++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
index 6296d0b29cc6..55a57cbbe4b0 100644
--- a/lib/matplotlib/artist.py
+++ b/lib/matplotlib/artist.py
@@ -1059,8 +1059,9 @@ def format_cursor_data(self, data):
             data[0]
         except (TypeError, IndexError):
             data = [data]
-        return ', '.join('{:0.3g}'.format(item) for item in data if
-                isinstance(item, (np.floating, np.integer, int, float)))
+        data_str = ', '.join('{:0.3g}'.format(item) for item in data if
+                   isinstance(item, (np.floating, np.integer, int, float)))
+        return "[" + data_str + "]"
 
     @property
     def mouseover(self):
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
index 97af9477e74e..e47e04eff8cc 100644
--- a/lib/matplotlib/backend_bases.py
+++ b/lib/matplotlib/backend_bases.py
@@ -2898,7 +2898,9 @@ def mouse_move(self, event):
                     if a is not event.inaxes.patch:
                         data = a.get_cursor_data(event)
                         if data is not None:
-                            s += ' [%s]' % a.format_cursor_data(data)
+                            data_str = a.format_cursor_data(data)
+                            if data_str is not None:
+                                s = s + ' ' + data_str
 
                 if len(self.mode):
                     self.set_message('%s, %s' % (self.mode, s))
diff --git a/lib/matplotlib/backend_tools.py b/lib/matplotlib/backend_tools.py
index 415fe8442b47..3f7c3d2f8ec7 100644
--- a/lib/matplotlib/backend_tools.py
+++ b/lib/matplotlib/backend_tools.py
@@ -344,7 +344,9 @@ def send_message(self, event):
                     if a is not event.inaxes.patch:
                         data = a.get_cursor_data(event)
                         if data is not None:
-                            s += ' [%s]' % a.format_cursor_data(data)
+                            data_str = a.format_cursor_data(data)
+                            if data_str is not None:
+                                s = s + ' ' + data_str
 
                 message = s
         self.toolmanager.message_event(message, self)