Fix typos (#335)

Author: kojix2

lib/iruby/kernel_app.rb

@@ -50,13 +50,13 @@ def run
         if argv.length <= 3
           @connection_file, @boot_file, @work_dir = argv
         else
-          raise ArgumentError, "Too many comandline arguments"
+          raise ArgumentError, "Too many commandline arguments"
         end
       else
         if argv.length <= 2
           @boot_file, @work_dir = argv
         else
-          raise ArgumentError, "Too many comandline arguments"
+          raise ArgumentError, "Too many commandline arguments"
         end
       end
 

test/iruby/application/register_test.rb

@@ -32,7 +32,7 @@ def setup
         end
       end
 
-      test("IRuby warns tthe existence of the kernel in IPython's kerenls directory and executes `jupyter kernelspec install` command") do
+      test("IRuby warns the existence of the kernel in IPython's kernels directory and executes `jupyter kernelspec install` command") do
         out, status = Open3.capture2e(*iruby_command("register"))
         assert status.success?
         assert_match(/^Fake Jupyter$/, out)