Improve legibility of terminal diff output

[tstromberg]

The diff output got kind of chopped up. This PR insures that there is still a consistent prefix line in front of all output relating to a file.

new:

├─ 😈 Changed: /var/home/t/preso/magic/libffmpeg-N110035.dylib [MEDIUM → CRITICAL]
│+    ▲ anti-static [NONE → CRITICAL]
│+      😈 xor/user_agent — XOR'ed user agent, often found in backdoors, by Florian Roth: 7OTJ::$Mozilla_5_0
│     ≡ cryptography [MEDIUM]
│       🔵 aes — Supports AES (Advanced Encryption Standard)
│       🟡 encrypt — encrypts data
│       🔵 rc4 — RC4 key scheduling algorithm, by Thomas Barabosch
│     ≡ data [MEDIUM]
│       🟡 base64/decode — decode base64 strings
│+      🔵 compression/gzip — works with gzip files
│       🔵 encoding/base64 — Supports base64 encoded strings
│+      🔵 random/insecure — generate random numbers insecurely: _rand, srand
│+    ▲ discovery [NONE → LOW]
│+      🔵 system/hostname — get computer host name: gethostname
│+      🔵 user/HOME — Looks up the HOME directory for the current user: getenv
│+    ▲ evasion [NONE → MEDIUM]
│+      🟡 file/prefix — hidden path generated dynamically: %s/.main_storage
│     ▼ execution [LOW → MEDIUM]
│+      🟡 cmd/pipe — launches program and reads its output: _pclose, _popen
│       🔵 shell/TERM — Look up or override terminal settings
│+      🟡 shell/arbitrary_command_dev_null — runs commands, discards output: "%s" >/dev/null
│     ≡ filesystem [MEDIUM]
│       🔵 directory/create — creates directories
│+      🔵 lock_update — apply or remove an advisory lock on a file: flock
│       🟡 path/tmp — path reference within /tmp
│+      🟡 permission/modify — modifies file permissions: chmod
│     ▲ impact [MEDIUM → CRITICAL]
│       🟡 remote_access/agent — references an 'agent'
│+      😈 remote_access/net_exec — executes programs, sets permissions, sleeps, makes HTTP requests:
│+         NSMutableURLRequest, chmod, flock, gethostname, localtime, pclose, popen, rand, sprintf, strncpy

old:

├─ 😈 Changed: /var/home/t/preso/magic/libffmpeg-N110035.dylib [MEDIUM → CRITICAL]
│     ▲ anti-static [NONE → CRITICAL]
+++     😈 xor/user_agent — XOR'ed user agent, often found in backdoors, by Florian Roth: 7OTJ::$Mozilla_5_0
│     ≡ cryptography [MEDIUM]
        🔵 aes — Supports AES (Advanced Encryption Standard)
        🟡 encrypt — encrypts data
        🔵 rc4 — RC4 key scheduling algorithm, by Thomas Barabosch
│     ≡ data [MEDIUM]
        🟡 base64/decode — decode base64 strings
+++     🔵 compression/gzip — works with gzip files
        🔵 encoding/base64 — Supports base64 encoded strings
+++     🔵 random/insecure — generate random numbers insecurely: _rand, srand
│     ▲ discovery [NONE → LOW]
+++     🔵 system/hostname — get computer host name: gethostname
+++     🔵 user/HOME — Looks up the HOME directory for the current user: getenv
│     ▲ evasion [NONE → MEDIUM]
+++     🟡 file/prefix — hidden path generated dynamically: %s/.main_storage
│     ▼ execution [LOW → MEDIUM]
+++     🟡 cmd/pipe — launches program and reads its output: _pclose, _popen
        🔵 shell/TERM — Look up or override terminal settings
+++     🟡 shell/arbitrary_command_dev_null — runs commands, discards output: "%s" >/dev/null
│     ≡ filesystem [MEDIUM]
        🔵 directory/create — creates directories
+++     🔵 lock_update — apply or remove an advisory lock on a file: flock
        🟡 path/tmp — path reference within /tmp
+++     🟡 permission/modify — modifies file permissions: chmod
│     ▲ impact [MEDIUM → CRITICAL]
        🟡 remote_access/agent — references an 'agent'
+++     😈 remote_access/net_exec — executes programs, sets permissions, sleeps, makes HTTP requests:
+++           NSMutableURLRequest, chmod, flock, gethostname, localtime, pclose, popen, rand, sprintf, strncpy