This file is indexed.

/usr/share/zsh/functions/Zle/zcalc-auto-insert is in zsh-common 5.0.7-5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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# Bind to a binary operator keystroke for use with zcalc

if [[ -n $ZCALC_ACTIVE ]]; then
  if [[ $CURSOR -eq 0 || $LBUFFER[-1] = "(" ]]; then
    LBUFFER+=${ZCALC_AUTO_INSERT_PREFIX:-"ans "}
  fi
fi
zle .self-insert