more imshow fixups

Author: nicolaskruchten

doc/python/imshow.md

@@ -437,10 +437,6 @@ for i, sigma in enumerate(sigmas):
 fig.show()
 ```
 
-```python
-print(fig)
-```
-
 ### Exploring 3-D images and timeseries with `animation_frame`
 
 *Introduced in plotly 4.14*
@@ -454,7 +450,7 @@ from skimage.data import image_fetcher
 path = image_fetcher.fetch('data/cells.tif')
 data = io.imread(path)
 img = data[25:40]
-fig = px.imshow(img, animation_frame=0, binary_string=True)
+fig = px.imshow(img, animation_frame=0, binary_string=True, labels=dict(animation_frame="yo"))
 fig.show()
 ```
 

packages/python/plotly/plotly/express/_imshow.py

@@ -522,7 +522,7 @@ def imshow(
         slice_label = (
             "facet_col" if labels.get("facet_col") is None else labels["facet_col"]
         )
-        col_labels = ["%s = %d" % (slice_label, i) for i in facet_slices]
+        col_labels = ["%s=%d" % (slice_label, i) for i in facet_slices]
     fig = init_figure(args, "xy", [], nrows, ncols, col_labels, [])
     for attr_name in ["height", "width"]:
         if args[attr_name]: