^M is DOS line break charater which shows up in unix files when uploaded from a windows file system in ascii format.
To remove this, open your file in vi editor and type
:%s/(ctrl-v)(ctrl-m)//g
and press Enter key.
Important!! – press (Ctrl-v) (Ctrl-m) combination to enter ^M character, dont use “^” and M.
If anything goes wrong exit with q!.