Fix newly found issues

spec/ameba/ast/scope_spec.cr

@@ -51,7 +51,7 @@ module Ameba::AST
     it "adds a new variable to the scope" do
       scope = Scope.new as_node("")
       scope.add_variable(Crystal::Var.new "foo")
-      scope.variables.any?.should be_true
+      scope.variables.empty?.should be_false
     end
   end
 

spec/ameba/ast/variabling/variable_spec.cr

@@ -48,7 +48,7 @@ module Ameba::AST
       it "assigns the variable (creates a new assignment)" do
         variable = Variable.new(var_node, scope)
         variable.assign(assign_node, scope)
-        variable.assignments.any?.should be_true
+        variable.assignments.empty?.should be_false
       end
 
       it "can create multiple assignments" do
@@ -64,7 +64,7 @@ module Ameba::AST
         variable = Variable.new(var_node, scope)
         variable.assign(as_node("foo=1"), scope)
         variable.reference(var_node, scope)
-        variable.references.any?.should be_true
+        variable.references.empty?.should be_false
       end
 
       it "adds a reference to the scope" do

src/ameba/ast/variabling/variable.cr

@@ -58,7 +58,7 @@ module Ameba::AST
     # variable.referenced? # => true
     # ```
     def referenced?
-      references.any?
+      !references.empty?
     end
 
     # Creates a reference to this variable in some scope.

src/ameba/ast/visitors/flow_expression_visitor.cr

@@ -60,7 +60,7 @@ module Ameba::AST
     end
 
     private def in_loop?
-      @loop_stack.any?
+      !@loop_stack.empty?
     end
   end
 end

src/ameba/cli/cmd.cr

@@ -61,7 +61,7 @@ module Ameba::Cli
         if f.size == 1 && f.first =~ /.+:\d+:\d+/
           configure_explain_opts(f.first, opts)
         else
-          opts.globs = f if f.any?
+          opts.globs = f unless f.empty?
         end
       end
 

src/ameba/rule/lint/unneeded_disable_directive.cr

@@ -36,7 +36,7 @@ module Ameba::Rule::Lint
         next unless token.type == :COMMENT
         next unless directive = source.parse_inline_directive(token.value.to_s)
         next unless names = unneeded_disables(source, directive, token.location)
-        next unless names.any?
+        next if names.empty?
 
         issue_for token, MSG % names.join(", ")
       end

src/ameba/rule/performance/first_last_after_filter.cr

@@ -45,7 +45,7 @@ module Ameba::Rule::Performance
     def test(source, node : Crystal::Call)
       return unless node.name.in?(CALL_NAMES) && (obj = node.obj)
       return unless obj.is_a?(Crystal::Call) && obj.block
-      return if !node.block.nil? || node.args.any?
+      return unless node.block.nil? && node.args.empty?
       return unless obj.name.in?(filter_names)
 
       message = node.name.includes?(CALL_NAMES.first) ? MSG : MSG_REVERSE