GitHub pull request #3277 of commit fc56235ab2d37875aacb6bdfa4813a36b4413c2e, no merge conflicts.sha1origin/pr/3277/mergeghprbActualCommitfc56235ab2d37875aacb6bdfa4813a36b4413c2eghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/jongiddy/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId3277ghprbTargetBranchmasterghprbSourceBranchfix-trace-typesGIT_BRANCHfix-trace-typesghprbPullAuthorEmailghprbPullAuthorLoginjongiddyghprbPullAuthorLoginMention@jongiddyghprbPullDescriptionGitHub pull request #3277 of commit fc56235ab2d37875aacb6bdfa4813a36b4413c2e, no merge conflicts.ghprbPullTitleFix bytes - strings confusion in trace toolghprbPullLinkhttps://github.com/iovisor/bcc/pull/3277ghprbPullLongDescriptionUsing `trace` with the `-n` or `-f` option gives me a `TypeError: string argument without an encoding`. This is due to bare use of the `bytes` constructor to convert a string. The [docs](https://docs.python.org/3.6/library/functions.html#func-bytearray) for `bytes` refer to `bytearray` which states \"If it is a string, you must also give the encoding\".\r\n\r\nFor `-n`, the comparison is the only place that `self.name` is used, so I moved the the conversion to the `__init__` method. For `-f`, the compared `msg` is already a string (because `self.python_format` is a string), so the conversion is unnecessary.\r\n\r\nI've also made some minor cleanups such as removing redundant backslashes and semicolons.ghprbCommentBody[buildbot, ok to test]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="Fix bytes - strings confusion in trace tool" href="https://github.com/iovisor/bcc/pull/3277">PR #3277</a>: Fix bytes - strings confusi...#84810971737460664bcc-pr #848848false8486793FAILURE1613970846882https://buildbot.iovisor.org/jenkins/job/bcc-pr/848/git848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc25/848/848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc26/848/848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc27/848/848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=fc28/848/848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=ubuntu1604/848/848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=ubuntu1710/848/848https://buildbot.iovisor.org/jenkins/job/bcc-pr/label=ubuntu1804/848/