[DOCS] How do I style my histogram?

[acampove]

Hi,

I am trying to make simple histogram and I want to make markers with vertical lines this is where the histogram plotting seems to be documented, but the arguments are undocumented. By default I get this:

I want to get something like:

How do you want to improve the docs

I do not see anything documented here. How is the user supposed to know how to use this?

Where is the typos and defects

EX. There is a typo ... in ...

What contents do you expect

I want something like:

`ls` Line style, can be:
   - Emty string for no line
   - "-" for dashed line
 ...