Add support for erblint (#3931)

* support for erblint

* fix tests

* test for handler

* wrong names

* typo

* doc layout

* CI failed?

doc/ale-eruby.txt

@@ -4,6 +4,7 @@ ALE Eruby Integration                                       *ale-eruby-options*
 There are four linters for `eruby` files:
 
 - `erb`
+- `erblint`
 - `erubis`
 - `erubi`
 - `ruumba`
@@ -13,6 +14,26 @@ default parser in Rails between 3.0 and 5.1. `erubi` is the default in Rails
 5.1 and later. `ruumba` can extract Ruby from eruby files and run rubocop on
 the result. To selectively enable a subset, see |g:ale_linters|.
 
+===============================================================================
+erblint                                                     *ale-eruby-erblint*
+
+g:ale_eruby_erblint_executable                 *g:ale_eruby_erblint_executable*
+                                               *b:ale_eruby_erblint_executable*
+  Type: |String|
+  Default: `'erblint'`
+
+  Override the invoked erblint binary. This is useful for running erblint
+  from binstubs or a bundle.
+
+
+g:ale_eruby_erblint_options                        *g:ale_ruby_erblint_options*
+                                                   *b:ale_ruby_erblint_options*
+  Type: |String|
+  Default: `''`
+
+  This variable can be change to modify flags given to erblint.
+
+
 ===============================================================================
 ruumba                                                       *ale-eruby-ruumba*