"Show Shell Command" Menu Option Generates Invalid Command Line Switches

I noticed that some options in the UI cause an invalid command line to be generated to form the "Show Shell Command" menu option. It appears that a few of the command were missing trailing spaces.

I have not compiled/tested this code, but the changes appear simple enough to warrant a pull request as-is.

![platypus options to create produce bug](https://f.cloud.github.com/assets/178680/89120/57b8d484-6520-11e2-9bf0-cc41404d605a.png)

![platypus invalid command line options](https://f.cloud.github.com/assets/178680/89119/57aa2fce-6520-11e2-81a5-7499514d7684.png)