Fix error with ++L (consequence of support for L strings) (#26)

* Fix error with ++L (consequence of support for L strings)

* Update to tree-sitter 0.15.5

corpus/expressions.txt

@@ -206,6 +206,7 @@ Math operators
 int main() {
   -a / b + c * -d;
   a++ - ++b + c-- + --d;
+  ++L;
   }
 
 ---
@@ -229,7 +230,8 @@ int main() {
               (update_expression (identifier))
               (update_expression (identifier)))
             (update_expression (identifier)))
-          (update_expression (identifier)))))))
+          (update_expression (identifier))))
+       (expression_statement (update_expression (identifier))))))
 
 ============================================
 The comma operator

grammar.js

@@ -772,8 +772,7 @@ module.exports = grammar({
     },
 
     char_literal: $ => seq(
-      optional('L'),
-      '\'',
+      choice('L\'', '\''),
       choice(
         $.escape_sequence,
         token.immediate(/[^\n']/)
@@ -787,8 +786,7 @@ module.exports = grammar({
     ),
 
     string_literal: $ => seq(
-      optional('L'),
-      '"',
+      choice('L"', '"'),
       repeat(choice(
         token.immediate(prec(1, /[^\\"\n]+/)),
         $.escape_sequence

src/grammar.json

@@ -4902,17 +4902,14 @@
           "members": [
             {
               "type": "STRING",
-              "value": "L"
+              "value": "L9;4;
             },
             {
-              "type": "BLANK"
+              "type": "STRING",
+              "value": "'"
             }
           ]
         },
-        {
-          "type": "STRING",
-          "value": "'"
-        },
         {
           "type": "CHOICE",
           "members": [
@@ -4959,17 +4956,14 @@
           "members": [
             {
               "type": "STRING",
-              "value": "L"
+              "value": "L\""
             },
             {
-              "type": "BLANK"
+              "type": "STRING",
+              "value": "\""
             }
           ]
         },
-        {
-          "type": "STRING",
-          "value": "\""
-        },
         {
           "type": "REPEAT",
           "content": {

src/node-types.json

@@ -2822,13 +2822,17 @@
     "named": true
   },
   {
-    "type": "L",
+    "type": "L9;4;,
     "named": false
   },
   {
     "type": "'",
     "named": false
   },
+  {
+    "type": "L\"",
+    "named": false
+  },
   {
     "type": "\"",
     "named": false