Add example from slides as lexer testcase.

1fbee7c0 · andreas.fried · 2264c0ba · 1fbee7c0 · 1fbee7c0
Commit 1fbee7c0 authored Oct 19, 2018 by andreas.fried
--- a/lexer/example.mj
+++ b/lexer/example.mj
+void method(int a) { return -42; }
\ No newline at end of file
--- a/lexer/example.mj.out
+++ b/lexer/example.mj.out
+void
+identifier method
+(
+int
+identifier a
+)
+{
+return
+-
+integer literal 42
+;
+}
+EOF
\ No newline at end of file