STYLE: remove unnecessary stdout, stderr /dev/null redirects

- no stderr redirect needed:
    * 'command -v'

- no stdout/stderr redirect needed:
    * 'rm -f'

STYLE: consistent spacing after redirects

applications/utilities/miscellaneous/OSspecific/addr2line/addr2line.C

@@ -186,7 +186,7 @@ std::string getLine(const std::string& filename, const std::string& addr)
           + "' -o '"
           + "target module load -f "
           + filename
-          + " __TEXT 0x0' 2> /dev/null"
+          + " __TEXT 0x0' 2>/dev/null"
           + " | grep LineEntry"
         );