Optimize coverage script/settings

.coveragerc

@@ -1,8 +1,7 @@
 [run]
 source = src/
 branch = true
-omit =
-    .venv/*
+command_line = -m unittest discover
 
 [report]
 fail_under = 100
@@ -11,5 +10,4 @@ skip_covered = False
 exclude_lines =
     if TYPE_CHECKING:
     if __name__ == ['"]__main__['"]:
-omit =
-    tests/*
+    if sys.version_info.+:

coverage.sh

@@ -12,13 +12,14 @@
 # You should have received a copy of the GNU Lesser General Public License along with asyncio-taskpool.
 # If not, see <https://www.gnu.org/licenses/>.
 
-coverage erase && coverage run -m unittest discover 2> /dev/null
+coverage erase
+coverage run 2> /dev/null
 
-typeset total
-total=$(coverage report | awk '$1 == "TOTAL" {print $NF}')
+typeset report=$(coverage report)
+typeset total=$(echo "${report}" | awk '$1 == "TOTAL" {print $NF; exit}')
 
-if [[ $total == 100% ]]; then
-  echo $total
+if [[ ${total} == 100% ]]; then
+  echo ${total}
 else
-  coverage report
+  echo "${report}"
 fi