Fix crystal-lang#7192 correctly

Currently nesting `it`/`pending` doesn't break `crystal spec -v` output.

src/spec/context.cr

@@ -169,10 +169,6 @@ module Spec
 
     @@spec_nesting = false
 
-    def self.check_nesting_spec(file, line)
-      check_nesting_spec(file, line) { }
-    end
-
     def self.check_nesting_spec(file, line, &block)
       raise NestingSpecError.new("can't nest `it` or `pending`", file, line) if @@spec_nesting
 

src/spec/methods.cr

@@ -36,33 +36,25 @@ module Spec::Methods
   #
   # It is usually used inside a `#describe` or `#context` section.
   def it(description = "assert", file = __FILE__, line = __LINE__, end_line = __END_LINE__, &block)
-    return unless Spec.matches?(description, file, line, end_line)
+    Spec::RootContext.check_nesting_spec(file, line) do
+      return unless Spec.matches?(description, file, line, end_line)
 
-    Spec.formatters.each(&.before_example(description))
+      Spec.formatters.each(&.before_example(description))
 
-    start = Time.monotonic
-    begin
-      Spec::RootContext.check_nesting_spec(file, line) do
+      start = Time.monotonic
+      begin
         Spec.run_before_each_hooks
         block.call
         Spec::RootContext.report(:success, description, file, line, Time.monotonic - start)
       rescue ex : Spec::AssertionFailed
         Spec::RootContext.report(:fail, description, file, line, Time.monotonic - start, ex)
         Spec.abort! if Spec.fail_fast?
-      rescue ex : Spec::NestingSpecError
-        new_ex = Spec::NestingSpecError.new("cannot nest `it` and `pending`: it has a nesting spec.", ex.file, ex.line)
-        Spec::RootContext.report(:error, description, file, line, Time.monotonic - start, new_ex)
-        Spec.abort! if Spec.fail_fast?
       rescue ex
         Spec::RootContext.report(:error, description, file, line, Time.monotonic - start, ex)
         Spec.abort! if Spec.fail_fast?
       ensure
         Spec.run_after_each_hooks
       end
-    rescue ex : Spec::NestingSpecError
-      Spec::RootContext.report(:error, description, file, line, Time.monotonic - start, ex)
-      Spec.abort! if Spec.fail_fast?
-      raise ex
     end
   end
 
@@ -78,12 +70,13 @@ module Spec::Methods
   #
   # It is usually used inside a `#describe` or `#context` section.
   def pending(description = "assert", file = __FILE__, line = __LINE__, end_line = __END_LINE__, &block)
-    return unless Spec.matches?(description, file, line, end_line)
+    Spec::RootContext.check_nesting_spec(file, line) do
+      return unless Spec.matches?(description, file, line, end_line)
 
-    Spec.formatters.each(&.before_example(description))
-    Spec::RootContext.check_nesting_spec(file, line)
+      Spec.formatters.each(&.before_example(description))
 
-    Spec::RootContext.report(:pending, description, file, line)
+      Spec::RootContext.report(:pending, description, file, line)
+    end
   end
 
   # Defines a yet-to-be-implemented pending test case