📝 clarify compare statements

doc/concept.sh

@@ -99,17 +99,23 @@ floor $1
 # only execute next line if cond is true
 if|ifl cond
 
-# cond:
+# value to bool
-x
+$1		# same as `$1 == true`
-!x
+!$1		# same as `$1 != true`
-x == y
+
-x != y
+# loosely typed compare
-x === y
+$1 == $2
-x !== y
+$1 != $2
-x < y
+
-x <= y
+# strongly typed compare
-x > y
+$1 === $2
-x >= y
+$1 !== $2
+
+# numerical / alphabetical compare
+$1 < $2
+$1 <= $2
+$1 > $2
+$1 >= $2