* lib/irb.rb: [DOC] Fix typo

s/degits/digits/
[ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44355 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/irb.rb

@@ -158,7 +158,7 @@ STDOUT.sync = true
 #     %m    # to_s of main object (self)
 #     %M    # inspect of main object (self)
 #     %l    # type of string(", ', /, ]), `]' is inner %w[...]
-#     %NNi  # indent level. NN is degits and means as same as printf("%NNd").
+#     %NNi  # indent level. NN is digits and means as same as printf("%NNd").
 #           # It can be ommited
 #     %NNn  # line number.
 #     %%    # %