Bug#839257: mention file sizes when mentioning Hash Sum mismatch

[積丹尼 Dan Jacobson <jidanni@jidanni.org>]

Package: apt
Version: 1.3
Severity: wishlist

I think whatever makes this message,

E: Failed to fetch http://free.nchc.org.tw/debian/pool/main/g/gst-python1.0/python3-gst-1.0_1.9.90-1_i386.deb: Hash Sum mismatch
   Hashes of expected file:
    - SHA256:b6a0c221da9540f972ced2c6384508166bcbdcb73913f7b242b0e7767d412d0f
    - MD5Sum:6dd260a0ee53311fb2f66ab206f66470 [weak]
    - Checksum-FileSize:58366 [weak]
   Hashes of received file:
    - SHA256:0b012265c75bf7129d2f83e58c3d1465580cabefb0e0358e54c0c2596738064c
    - MD5Sum:a4ae0097d16931d062296f43b501e27e [weak]
    - Checksum-FileSize:24585 [weak]
   Last modification reported: Fri, 30 Sep 2016 13:33:32 +0000

should also mention the file sizes.
I bet that would make the problem obvious, e.g., truncated files.