Initial data commit

Task/String-comparison/Avail/string-comparison.avail

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+Method "string comparisons_,_" is
+[
+    a : string,
+    b : string
+|
+    Print: "a & b are equal? " ++ “a = b”;
+    Print: "a & b are not equal? " ++ “a ≠ b”;
+    // Inequalities compare by code point
+    Print: "a is lexically before b? " ++ “a < b”;
+    Print: "a is lexically after b? " ++ “a > b”;
+    // Supports non-strict inequalities
+    Print: "a is not lexically before b? " ++ “a ≥ b”;
+    Print: "a is not lexically after b? " ++ “a ≤ b”;
+    // Case-insensitive comparison requires a manual case conversion
+    Print: "a & b are equal case-insensitively?" ++ “lowercase a = lowercase b”;
+];