I was bitten pretty hard (my fault!) by a subtle difference in eXtended mode's handling of spaces in character classes. I was expecting (except in a much more complicated context) (?x)[ ] to match a single space as it does with pcre2, but that does not seem to be the case (and doesn't seem to be documented?).

In PCRE2, (?x) enables spurious use of whitespace everywhere except in character c

After the release of Ruby 2.4.1, some blog posts about the absent operator were written, and they caused some discussions.

Blog posts:

• The New ‘Absent Operator’ in Ruby’s Regular Expressions – Ruby Inside – Medium
• [Ruby 2.4.1新機能: Onigmo正規表現の非包含演算子(?~ )をチェック](https://techracho.b

Ideally, Regexp#examples should always return up to max_results_limit.

Currently, it usually "aborts" before this limit is reached. (I.e. the exact number of examples generated can be hard to predict, for complex patterns.)

An enhancement would be to modify the algorithm such that results are always generated up to max_results_limit if possible.

Not sure if this is the right place for it, but I want people searching for it to find it.

Since I wanted one, I made a playground for Moo: https://ablingeroscar.github.io/moo-playground/ (github link)

It's not especially pretty, but it works.

The 1.8.0 release initially failed because of javadoc errors, most of which are fixed now. To make sure we spot these earlier next time, we should enable doclint and javadoc production in CI

https://github.com/VerbalExpressions/JSVerbalExpressions

Perhaps add a section to your readme clarifying how your lib is better than similar existing projects.

• Basics Not applicable
• Character Classes
• Character Escapes Not applicable
• Escapes
• Groups
• Repetition
• Alternation
• Anchors
• Lookaround

Currently, the readme links to ["Characterization of a global germplasm collection and its potential utilization for analysis of complex quantitative traits in maize"](https://www.researchgate.net/profile/XU_Shutu/publication/229032602_Characterization_of_a_global_germplasm_collection_and_its_potential_utilization_for_analysis_of_complex_quantitative_traits_in_maize/links/02bfe50f914d04c837000000.

webpack.DefinePlugin offer a native way to run simple replacements, which covers the first example.

I can open a PR that adds a link to this issue as documentation in the readme, and add more examples, including dynamic ones like sindresorhus/refined-github@130c110

With this loader

module.exports = {
  module: {