diff --git a/vscode-extension/syntaxes/pico.tmLanguage.json b/vscode-extension/syntaxes/pico.tmLanguage.json
index a489f46..527e06e 100644
--- a/vscode-extension/syntaxes/pico.tmLanguage.json
+++ b/vscode-extension/syntaxes/pico.tmLanguage.json
@@ -14,7 +14,7 @@
       "end": "(\\\")",
       "patterns": [
         {
-          "match": "((?:\\\\)(?:\\\"))",
+          "match": "((?:\\\\)[\\\"\\\\])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -22,7 +22,7 @@
           }
         },
         {
-          "match": "([\\x{01}-\\!\\#-\\x{10FFFF}])",
+          "match": "([\\x{01}-\\!\\#-\\[\\]-\\x{10FFFF}])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -197,7 +197,7 @@
       }
     },
     "/inner/single/expression.strcon": {
-      "match": "((?<=(?:[\\t-\\n\\r\\x{20}\\%]|(?:(?:^))))(?:(?:\\\")(?:(?:(?:\\\\)(?:\\\"))|[\\x{01}-\\!\\#-\\x{10FFFF}])*?(?:\\\")))",
+      "match": "((?<=(?:[\\t-\\n\\r\\x{20}\\%]|(?:(?:^))))(?:(?:\\\")(?:(?:(?:\\\\)[\\\"\\\\])|[\\x{01}-\\!\\#-\\[\\]-\\x{10FFFF}])*?(?:\\\")))",
       "name": "/inner/single/expression.strcon",
       "captures": {
         "1": {
diff --git a/vscode-extension/syntaxes/rascal.tmLanguage.json b/vscode-extension/syntaxes/rascal.tmLanguage.json
index 4095f9d..c462663 100644
--- a/vscode-extension/syntaxes/rascal.tmLanguage.json
+++ b/vscode-extension/syntaxes/rascal.tmLanguage.json
@@ -229,7 +229,7 @@
           }
         },
         {
-          "match": "([\\x{01}-\\!\\#-\\&\\(-\\;\\=\\?-\\[\\]-\\x{10FFFF}])",
+          "match": "((?:\\\\)u[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -237,7 +237,7 @@
           }
         },
         {
-          "match": "((?:\\\\)[\\\"\\'\\<\\>\\\\bfnrt])",
+          "match": "((?:\\\\)a[0-7][0-9A-Fa-f])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -253,7 +253,7 @@
           }
         },
         {
-          "match": "((?:\\\\)a[0-7][0-9A-Fa-f])",
+          "match": "((?:\\\\)[\\\"\\'\\<\\>\\\\bfnrt])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -261,7 +261,7 @@
           }
         },
         {
-          "match": "((?:\\\\)u[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])",
+          "match": "([\\x{01}-\\!\\#-\\&\\(-\\;\\=\\?-\\[\\]-\\x{10FFFF}])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -302,7 +302,7 @@
           }
         },
         {
-          "match": "([\\x{01}-\\!\\#-\\&\\(-\\;\\=\\?-\\[\\]-\\x{10FFFF}])",
+          "match": "((?:\\\\)u[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -310,7 +310,7 @@
           }
         },
         {
-          "match": "((?:\\\\)[\\\"\\'\\<\\>\\\\bfnrt])",
+          "match": "((?:\\\\)a[0-7][0-9A-Fa-f])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -318,7 +318,7 @@
           }
         },
         {
-          "match": "((?:\\n)[\\t\\x{20}\\x{A0}\\x{1680}\\x{2000}-\\x{200A}\\x{202F}\\x{205F}\\x{3000}]*?(?:\\'))",
+          "match": "((?:\\\\)[\\\"\\'\\<\\>\\\\bfnrt])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -326,7 +326,7 @@
           }
         },
         {
-          "match": "((?:\\\\)a[0-7][0-9A-Fa-f])",
+          "match": "((?:\\n)[\\t\\x{20}\\x{A0}\\x{1680}\\x{2000}-\\x{200A}\\x{202F}\\x{205F}\\x{3000}]*?(?:\\'))",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -334,7 +334,7 @@
           }
         },
         {
-          "match": "((?:\\\\)u[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])",
+          "match": "([\\x{01}-\\!\\#-\\&\\(-\\;\\=\\?-\\[\\]-\\x{10FFFF}])",
           "captures": {
             "1": {
               "name": "string.quoted.double"
@@ -557,7 +557,7 @@
           }
         },
         {
-          "match": "([\\x{01}-\\!\\#-\\&\\(-\\;\\=\\?-\\[\\]-\\x{10FFFF}])",
+          "match": "((?:\\\\)u[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])",
           "captures": {
             "1": {
               "name": "string.quoted.single"
@@ -565,7 +565,7 @@
           }
         },
         {
-          "match": "((?:\\\\)[\\\"\\'\\<\\>\\\\bfnrt])",
+          "match": "((?:\\\\)a[0-7][0-9A-Fa-f])",
           "captures": {
             "1": {
               "name": "string.quoted.single"
@@ -581,7 +581,7 @@
           }
         },
         {
-          "match": "((?:\\\\)a[0-7][0-9A-Fa-f])",
+          "match": "((?:\\\\)[\\\"\\'\\<\\>\\\\bfnrt])",
           "captures": {
             "1": {
               "name": "string.quoted.single"
@@ -589,7 +589,7 @@
           }
         },
         {
-          "match": "((?:\\\\)u[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])",
+          "match": "([\\x{01}-\\!\\#-\\&\\(-\\;\\=\\?-\\[\\]-\\x{10FFFF}])",
           "captures": {
             "1": {
               "name": "string.quoted.single"