Fix more issues identified through shellcheck

Merge pull request #355 from a1346054/master

Author: inkarkat

.github/ISSUE_TEMPLATE.md

@@ -10,7 +10,7 @@
 **What is the expected behavior?**
 
 
-**Which versions todo.sh are you using?**
+**Which version of todo.sh are you using?**
 > Run `todo.sh -V`
 
 
@@ -19,4 +19,3 @@
 
 **Which version of bash are you using?**
 > Run `bash --version`
-

GEN-VERSION-FILE

@@ -14,13 +14,13 @@ fi
 
 VN=$(expr "$VN" : v*'\(.*\)')
 
-if test -r $VF
+if test -r "$VF"
 then
-	VC=$(sed -e 's/^VERSION=//' <$VF)
+	VC=$(sed -e 's/^VERSION=//' <"$VF")
 else
 	VC=unset
 fi
 test "$VN" = "$VC" || {
 	echo >&2 "VERSION=$VN"
-	echo "VERSION=$VN" >$VF
+	echo "VERSION=$VN" >"$VF"
 }