Experimental lexer generator: Fix the rest of the failures.

tools/lexer_generator/code_generator.jinja

 #include "lexer/even-more-experimental-scanner.h"
 
 
 {# TODO implement CLASS checks #}
 {%- macro do_key(key) -%}
   {%- for r in key.range_iter() -%}
     {%- if not loop.first %} || {% endif -%}
     {%- if r[0] == 'LATIN_1' -%}
       {%- if r[1][0] == r[1][1] -%}
         yych == {{r[1][0]}}
@@ skipping 101 matching lines @@
 
 #define PUSH_LINE_TERMINATOR(s) {     \
   start_ = cursor_;                   \
   just_seen_line_terminator_ = true;  \
 }
 
 #define FORWARD() {                   \
   yych = *(++cursor_);                \
 }
 
+#define BACKWARD() {                  \
+  yych = *(--cursor_);                \
+}
+
 #define SKIP() {                      \
   start_ = cursor_;                   \
 }
 
 namespace v8 {
 namespace internal {
 Token::Value EvenMoreExperimentalScanner::Next(int* beg_pos_to_return,
                                                int* end_pos_to_return) {
   // Setup environment.
   YYCTYPE yych = *cursor_;
@@ skipping 12 matching lines @@
 {% endif -%}
     {{dispatch_action(default_action[0], default_action[1])}}
   FORWARD();
   goto code_start;
 
   fell_through:
   CHECK(false);
 }
 } }