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Merge pull request #9 from andrewchambers/docs

update lang.txt entry for match statements

--- a/doc/lang.txt

+++ b/doc/lang.txt

@@ -323,8 +323,8 @@

         Match statements consist of the keyord 'match', followed by

         the expression to match against the patterns, followed by a

         newline. The body of the match statement consists of a list

-        of pattern clauses. A patterned clause is a pattern, followed

-        by a ':', followed by a block body.

+        of pattern clauses. A patterned clause is a '|', followed by

+        a pattern, followed by a ':', followed by a block body.

         An example of the syntax follows:

@@ -332,20 +332,17 @@

             var v = `Val 123            /* set up variable to match */

             match v

             /* pattern clauses */

-            `Val 123:

-                std.put("Matched literal union pat\n");;

-            Val234:

+            | `Val 123:

+                std.put("Matched literal union pat\n")

+            | Val234:

                 std.put("Matched const value pat\n")

-                ;;

-            `Val a:

+            | `Val a:

                 std.put("Matched pattern with capture\n")

                 std.put("Captured value: a = %i\n", a)

-                ;;

-            a

-                std.put("A top level bind matches anything.");;

-            `Val 111

+            | a

+                std.put("A top level bind matches anything.")

+            | `Val 111

                 std.put("Unreachable block.")

-                ;;

             ;;