- Modified `jpw-clean-trailing-whitespace' so that users can customize   when it runs, via the new variable `jpw-keep-trailing-whitespace'.
- Modified `jpw-clean-trailing-whitespace' so that users can customize
  when it runs, via the new variable `jpw-keep-trailing-whitespace'.


git-svn-id: 878c64cd919f2ae7d170da6c2e364f71b9f82c56@2702 92e5ae4a-8afd-0310-8b33-eaebc6dd6768

jpweiss/tools,jpweiss/tools