underscores in labels are no longer supported

Describe the bug Upon upgrading from 8.2.3 to 8.2.4 you can no longer use underscores in labels. The results in links to the live editor created last week now leading to an error page

To Reproduce Steps to reproduce the behavior: Create a graph using the following:

graph LR

foo[my_lib.foo]
bar[my_lib.bar]
baz[my_lib.qux.baz]

foo --> bar
bar --> baz

Expected behavior

Screenshots

Desktop (please complete the following information):

• OS: OSX
• Browser Chrome
• Version 75

Additional context The reproduction screenshots were taken using local checkouts of the live editor repo, but the issue is live at mermaidjs.github.io/mermaid-live-editor

[knsv]

Will fix it in 8.2.6 but meanwhile you can simply put the string within quotes like below:

graph LR

foo["my_lib.foo"]
bar["my_lib.bar"]
baz["my_lib.qux.baz"]

foo --> bar
bar --> baz

[alistair-broomhead]

@knsv Thanks, and kudos on such a quick response/turn-around