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I have checked all calls of ffAppendFDBuffer and fix most of the trailing space problems.
Some data just passed to the parser(e.g. strtoul), trailing space in these cases are not problems, stay as is.
The contents of some sysfs files have a fixed format(like /sys/class/net/*/operstate), so instead of removing trailing spaces and newlines, the contents being compared are updated.
Code under
src/logo
I didn't change because there is no trailing space problem here, but I'm not 100% sure. This shoule be checked in reviewing.