Don't use any special characters other than a period to separate the minutes and seconds. You can use spaces.
I tried it by copying and pasting a set of coordinates from a cache page exactly as displayed and the special characters didn't make any difference so on the search page it doesn't seem to matter. When I told it to use my home location, I noticed the apostrophes were present but not the alpha-numeric you mentioned. I am using latest version of Chrome on a laptop running Win 7.