Huang Qi fd8ce46060 system/cle: Don't echo extra '\n'
Before:
```
NuttShell (NSH) NuttX-12.0.0
nsh> free
/* Extra line here */
                   total       used       free    largest  nused  nfree
        Umem:   33154512      33584   33120928   33120928     96      1
```

After:
```
NuttShell (NSH) NuttX-12.0.0
nsh> free
                   total       used       free    largest  nused  nfree
        Umem:   33154512      33584   33120928   33120928     96      1
```

Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
2023-03-04 13:50:08 +08:00
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