OHLC hover text date format bug

[im-keiran]

Software Version Info

python 3.12.8
bokeh 3.6.2
holoviews 1.20.0

Description of expected behavior and the observed behavior

The tooltip/hover text in ohlc plots does not recognise datetime formats, shows a long integer instead. See screenshot below of hvplot reference gallery example.

Complete, minimal, self-contained example code that reproduces the issue

https://hvplot.holoviz.org/reference/tabular/ohlc.html

Screenshots or screencasts of the bug in action

[hoxbro]

We likely need some logic around HoverTool's formatter around here:

hvplot/hvplot/converter.py

Lines 2632 to 2642 in d2bce93

	if 'hover' in tools:
	tools[tools.index('hover')] = HoverTool(
	tooltips=[
	(x, f'@{x}'),
	('Open', f'@{o}'),
	('High', f'@{h}'),
	('Low', f'@{l}'),
	('Close', f'@{c}'),
	]
	+ [(hc, f'@{hc}') for hc in vdims[4:]]
	)