Avoid capturing the trailing /

Author: arrdem

py/tools/py/src/runfiles_interpreter.tmpl

@@ -22,7 +22,7 @@ _activate_find_runfiles() {
        # find the manifest file and runfiles tree relative to the execroot.
 
        # HACK: We can't lazy-match to the first /bin/, so we have to manually count four groups
-       EXECROOT="$(echo "${1}" | sed 's/\(execroot\/[^\/]*\/[^\/]*\/[^\/]*\/[^\/]*\/\).*$/\1/' )"
+       EXECROOT="$(echo "${1}" | sed 's/\(execroot\/[^\/]*\/[^\/]*\/[^\/]*\/[^\/]*\).*$/\1/' )"
        export RUNFILES_DIR="${EXECROOT}/${RUNFILES_PATH}"
     elif [[ "${1}" == *.runfiles/* ]]; then
        # Examples: