Whitespace error: trailing space at end of line

When using git to submit Python source code, the following error occurs: whitespace error: trailing space at end of line. Analyze the source file carefully and find that lines at the end of the source code are indeed spaces. According to the general rule, such a situation should not occur, and it is meaningless. All spaces at the end of the line should be removed.
After careful analysis, it may be that some of the commonly used Python editors set incorrect or improperly handled trailing space:
The following is a simple test:
Sublime text2 handles trailing space by default
Python idle also handles trailing space by default
Pydev/Aptana does not process trailing space by default.
It seems that the problem is caused by the default settings of pydev/Aptana.
To enable pydev/Aptana to support trailing space processing, the specific settings are as follows:

Preferences> pydev> editor> code style> code formatter

And check the "right trim lines? "Check box.