Keep spaces around `=` when replacing version in mkit.ini

src/include/ini.sh

             if      ($done) { print; next; }
             elsif   (m/\[project\]/) { $hit++; print; next; }
             elsif   (m/\[/) { $hit = 0; print; next; }
-            elsif   ($hit) { s/\bversion\b *=.*/version = $ARGV[0]/ and $done++; print; }
+            elsif   ($hit) { s/\bversion\b( *)=( *).*/version$1=$2$ARGV[0]/ and $done++; print; }
             else { print; next; }
         }
     ' "$version" >"$tmp" || die "failed to update version in mkit.ini"