Add support for pre-commit hook/linting

.pre-commit-config.yaml
-----------------------
  o Create initial config for pre-commit hook.

misc/*
  o Basic inline cleanups courtesy of the pre-commit hook.

Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
Change-Id: I6aa20216ade22b1a7406e8358864fb245842b713
diff --git a/jjb/shell/common/example.sh b/jjb/shell/common/example.sh
index 0c0e46a..ada12ae 100755
--- a/jjb/shell/common/example.sh
+++ b/jjb/shell/common/example.sh
@@ -54,7 +54,7 @@
 # foo: hello - stack_frame[1]
 # bar: hello - stack_frame[2]
 # tans: early exit for stacktrace
-# 
+#
 # OFFENDER: ./example.sh:1
 # ERROR: 'exit 1' exited with status 1
 # Call tree: