fix(ruby): adjust capture predicates (#339)

Replaces the `#match?` predicate where the `#any-of?` or `#eq?`
predicates would suffice

Author: AlternateRT

languages/ruby/highlights.scm

@@ -57,7 +57,7 @@
 ] @keyword
 
 ((identifier) @keyword
-  (#match? @keyword "^(private|protected|public)$"))
+  (#any-of? @keyword "private" "protected" "public"))
 
 ; Function calls
 (call
@@ -129,7 +129,7 @@
 
 ; Identifiers
 ((identifier) @constant.builtin
-  (#match? @constant.builtin "^__(FILE|LINE|ENCODING)__$"))
+  (#any-of? @constant.builtin "__FILE__" "__LINE__" "__ENCODING__"))
 
 (file) @constant.builtin
 

languages/ruby/textobjects.scm

@@ -10,8 +10,8 @@
 (call
   receiver: (constant) @_class_const
   method: (identifier) @_class_method
-  (#match? @_class_const "Class")
-  (#match? @_class_method "new")
+  (#eq? @_class_const "Class")
+  (#eq? @_class_method "new")
   (do_block
     (_)+ @class.inside)) @class.around