cleaned up bashisms

rusty-checker.sh

@@ -27,7 +27,7 @@ if [ "$PROV" = "gh" ]; then
   LANG_URL=""
 elif [ "$PROV" = "gl" ]; then
   TGT="${temp#*gitlab.com/}"
-  ROOT_URL="https://gitlab.com/api/v4/projects/${TGT/\//%2F}"
+  ROOT_URL="https://gitlab.com/api/v4/projects/$(echo "$TGT" | sed 's/\//%2F/g')"
   LANG_URL="${ROOT_URL}/languages"
 elif [ "$PROV" = "cb" ]; then
   TGT="${temp#*codeberg.org/}"
@@ -55,15 +55,15 @@ echo "$langdata" | grep -qi "$CHLANG" && CORR_SCORE=$((CORR_SCORE + 10))
 # but if it is the main one, we further increase the score by 50
 echo "$mainlang" | grep -qi "$CHLANG" && CORR_SCORE=$((CORR_SCORE + 50)) 
 
-if ((CORR_SCORE >= 50)); then
+if [ "$CORR_SCORE" -ge 50 ]; then
   echo "The project $TGT is most likely written in $CHLANG."
-  if ((CORR_SCORE >= 100)); then
+  if [ "$CORR_SCORE" -ge 100 ]; then
     echo 'The author is a definite fanatic of this language.'
   fi
   exit 0
 else
   echo "The project $TGT does not seem to be written in $CHLANG."
-  if ((CORR_SCORE > 0)); then
+  if [ "$CORR_SCORE" -gt 0 ]; then
     echo 'However, this language may be partially used there.'
   fi
   exit 1;