shMESA extras not copying the contents of the RSE template properly

[andysantarelli]

• A minor bug, but shMESA does not copy the contents of the RSE template to the working directory.
• It appears to be a simple spacing issue on line 294 of $MESA_DIR/scripts/shmesa/shmesa
  • perl -i -pe "s| include 'standard_run_star_extras.inc'|$contents|g" "$rse"
  • should become...
  • perl -i -pe "s|\s*include 'standard_run_star_extras.inc'|$contents|g" "$rse"
  • this makes the replacement independent of how many spaces are in the string being replaced