Julia component generator should escape $ within docstrings

[rpkyle]

Following my attempt to build DashTable.jl, the following error appeared:

[ Info: Precompiling DashTable [1b08a953-4be3-4667-9a23-759fc69216d1]
ERROR: LoadError: LoadError: syntax: invalid interpolation syntax: "$'"

The culprit appears to be two occurrences of $' within the docstring, based on my reading of this issue: JuliaLang/julia#10816.

We should modify the component generator to prepend a \ to escape $ whenever they occur, which should resolve the error at component build time in the future.

A similar change was made for the R component generator, to address unescaped backslashes:

dash/dash/development/_r_components_generation.py

Lines 411 to 413 in 316b662

	# auto-replace any unescaped backslashes for compatibility with R docs
	description = re.sub(r"(?<!\\)%", "\\%", description)
	item_text = re.sub(r"(?<!\\)%", "\\%", item_text)

[alexcjohnson]

@waralex included this in #1302 - now part of #1189 -> here

I haven't tried building DashTable.jl yet but I'm assuming this is fixed.

[rpkyle]

@waralex included this in #1302 - now part of #1189 -> here

I haven't tried building DashTable.jl yet but I'm assuming this is fixed.

Yep, looks to have been fixed:

dash/dash/development/_jl_components_generation.py

Lines 436 to 442 in b5e59a2

	docstring = (
	create_docstring_jl(
	component_name=name, props=filtered_props, description=description
	)
	.replace("\r\n", "\n")
	.replace("$", "\\$")
	)

I'll go ahead and close now.