matchers: fix the bug in rust PatternMatcher that made it cut off early
This brings the rust output in line with the Python output.
#!/usr/bin/env python3importerrnoimportosimportsysforfinsys.argv[1:]:try:print(f,'->',os.readlink(f))exceptOSErroraserr:iferr.errno!=errno.EINVAL:raiseprint(f,'->',f,'not a symlink')sys.exit(0)