Fix typos (#53)

Fix some typos on tests and comments

Author: pmareke

test/error_tracker/telemetry_test.exs

@@ -10,7 +10,7 @@ defmodule ErrorTracker.TelemetryTest do
     :ok
   end
 
-  test "event is emitted for new errors" do
+  test "events are emitted for new errors" do
     # Since the error is new, both the new error and new occurrence events will be emitted
     report_error(fn -> raise "This is a test" end)
     assert_receive {:telemetry_event, [:error_tracker, :error, :new], _, %{error: %Error{}}}
@@ -29,7 +29,7 @@ defmodule ErrorTracker.TelemetryTest do
                     %{occurrence: %Occurrence{}}}
   end
 
-  test "event is emitted for resolved and unresolved errors" do
+  test "events are emitted for resolved and unresolved errors" do
     %Occurrence{error: error = %Error{}} = report_error(fn -> raise "This is a test" end)
 
     # The resolved event will be emitted

test/error_tracker_test.exs

@@ -25,7 +25,7 @@ defmodule ErrorTrackerTest do
       assert error.kind == to_string(ArithmeticError)
       assert error.reason == "bad argument in arithmetic expression"
 
-      # Elixir 1.17.0 reports this errors differntly than previous versions
+      # Elixir 1.17.0 reports these errors differently than previous versions
       if Version.compare(System.version(), "1.17.0") == :lt do
         assert error.source_line =~ @relative_file_path
       else