Errors from path arguments with spaces

[jbrad3]

In v1.3.2, I have found that errors are encountered from

• remote paths with spaces
• rsync arguments containing paths with spaces

Here is the behavior in Ubunty 20.04.6:
$ timemachine -d remotehost:/home/user/spaced\ dir /home/user/backup
2023-05-29 16:51:34 timemachine: [DEBUG] $ ssh -oStrictHostKeyChecking=no -oLogLevel=QUIET -q remotehost test -d '/home/user/spaced dir'
bash: line 0: test: /home/user/spaced: binary operator expected

$ timemachine -d /home/user/data /home/user/backup -- --exclude-from=/home/user/spaced\ dir/exclude.txt
2023-05-29 17:02:45 timemachine: [INFO] $ rsync --exclude-from=/home/user/spaced dir/exclude.txt '/home/user/data' '/home/user/backup/.inprogress'
rsync: failed to open exclude file /home/user/spaced: No such file or directory (2)
rsync error: error in file IO (code 11) at exclude.c(1496) [client=3.1.3]
2023-05-29 17:02:45 timemachine: [ERROR] timemachine Backup has failed

These changes (in two cases each) and one addition resolve these issues:
- ssh_cmd="test -d ${dir_part}"
+ ssh_cmd="test -d \"${dir_part}\""

- cmd="ssh ${SSH_ARGS} ${ssh_part} ${ssh_cmd}"
+ cmd="ssh ${SSH_ARGS} ${ssh_part} \"${ssh_cmd}\""

+# Path escape the rsync options in case there are any spaces in them
+RSYNC_OPTS=$( escape_path "${@}" )
+

- logmsg "\$ rsync $* $( escape_path "${SRC}" ) $( escape_path "${DEST}/${BACKUP_INPROGRESS}" )"
+ logmsg "\$ rsync ${RSYNC_OPTS} $( escape_path "${SRC}" ) $( escape_path "${DEST}/${BACKUP_INPROGRESS}" )"

- $* \
+ ${RSYNC_OPTS} \