Update FortranCon2020-community/README.md

Co-authored-by: Ondřej Čertík <ondrej@certik.us>

Author: milancurcic

FortranCon2020-community/README.md

@@ -30,6 +30,6 @@ expert alike, to find a set of recommended tools, libraries, tutorials, and
 discussion venues that are inclusive and welcoming of newcomers to the language.
 We believe that an organized community and a home of Fortran on the internet,
 in addition to the ongoing work by the Standards Committee and compiler developers,
-are essential for the long-term thriving--and not just mere survival--of Fortran.
+are essential for the long-term thriving -- and not just mere survival -- of Fortran.
 Finally, we'll discuss the next steps, the one-year vision, and the 10-year
 vision for going forward.