Fix #1583: Crash with text.usetex=True and plt.annotate -- usetex bounding boxes are all NaNs when text is empty.

mdboom · mdboom · commit 707edb5373fb · 2012-12-11T12:48:25.000-05:00
diff --git a/lib/matplotlib/text.py b/lib/matplotlib/text.py
@@ -740,7 +740,7 @@ def get_window_extent(self, renderer=None, dpi=None):
         if dpi is not None:
             dpi_orig = self.figure.dpi
             self.figure.dpi = dpi
-        if self.get_text() == '':
+        if self.get_text().strip() == '':
             tx, ty = self._get_xy_display()
             return Bbox.from_bounds(tx,ty,0,0)
 
