diff --git a/dev/customer_testing/run_tests.dart b/dev/customer_testing/run_tests.dart
index 3008ee6..dc5acb8 100644
--- a/dev/customer_testing/run_tests.dart
+++ b/dev/customer_testing/run_tests.dart
@@ -259,7 +259,7 @@
   const TestFile._(this.contacts, this.fetch, this.update, this.tests);
 
   // (e-mail regexp from HTML standard)
-  static final RegExp _email = RegExp(r'''^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$''');
+  static final RegExp _email = RegExp(r"^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$");
   static final RegExp _fetch1 = RegExp(r'^git(?: -c core.longPaths=true)? clone https://github.com/[-a-zA-Z0-9]+/[-_a-zA-Z0-9]+.git tests$');
   static final RegExp _fetch2 = RegExp(r'^git(?: -c core.longPaths=true)? -C tests checkout [0-9a-f]+$');
 
diff --git a/dev/docs/dashing_postprocess.dart b/dev/docs/dashing_postprocess.dart
index e2c42f4..9f186e4 100644
--- a/dev/docs/dashing_postprocess.dart
+++ b/dev/docs/dashing_postprocess.dart
@@ -21,7 +21,7 @@
 
   // Since I didn't want to add the XML package as a dependency just for this,
   // I just used a regular expression to make this simple change.
-  final RegExp findRe = RegExp(r'''(\s*<key>DocSetPlatformFamily</key>\s*<string>)[^<]+(</string>)''', multiLine: true);
+  final RegExp findRe = RegExp(r'(\s*<key>DocSetPlatformFamily</key>\s*<string>)[^<]+(</string>)', multiLine: true);
   contents = contents.replaceAllMapped(findRe, (Match match) {
     return '${match.group(1)}dartlang${match.group(2)}';
   });
diff --git a/dev/tools/gen_keycodes/lib/key_data.dart b/dev/tools/gen_keycodes/lib/key_data.dart
index 8853f73..6f7ec5c 100644
--- a/dev/tools/gen_keycodes/lib/key_data.dart
+++ b/dev/tools/gen_keycodes/lib/key_data.dart
@@ -146,7 +146,7 @@
   /// Also, note that some keys (notably MEDIA_EJECT) can be mapped to more than
   /// one scan code, so the mapping can't just be 1:1, it has to be 1:many.
   Map<String, List<int>> _readAndroidScanCodes(String keyboardLayout) {
-    final RegExp keyEntry = RegExp(r'''#?\s*key\s+([0-9]+)\s*"?(?:KEY_)?([0-9A-Z_]+|\(undefined\))"?\s*(FUNCTION)?''');
+    final RegExp keyEntry = RegExp(r'#?\s*key\s+([0-9]+)\s*"?(?:KEY_)?([0-9A-Z_]+|\(undefined\))"?\s*(FUNCTION)?');
     final Map<String, List<int>> result = <String, List<int>>{};
     keyboardLayout.replaceAllMapped(keyEntry, (Match match) {
       if (match.group(3) == 'FUNCTION') {
@@ -176,7 +176,7 @@
     final RegExp enumBlock = RegExp(r'enum\s*\{(.*)\};', multiLine: true);
     // Eliminate everything outside of the enum block.
     headerFile = headerFile.replaceAllMapped(enumBlock, (Match match) => match.group(1));
-    final RegExp enumEntry = RegExp(r'''AKEYCODE_([A-Z0-9_]+)\s*=\s*([0-9]+),?''');
+    final RegExp enumEntry = RegExp(r'AKEYCODE_([A-Z0-9_]+)\s*=\s*([0-9]+),?');
     final Map<String, int> result = <String, int>{};
     for (final Match match in enumEntry.allMatches(headerFile)) {
       result[match.group(1)] = int.parse(match.group(2));
@@ -191,7 +191,7 @@
   ///  #define GLFW_KEY_SPACE              32,
   Map<String, int> _readGlfwKeyCodes(String headerFile) {
     // Only get the KEY definitions, ignore the rest (mouse, joystick, etc).
-    final RegExp enumEntry = RegExp(r'''define GLFW_KEY_([A-Z0-9_]+)\s*([A-Z0-9_]+),?''');
+    final RegExp enumEntry = RegExp(r'define GLFW_KEY_([A-Z0-9_]+)\s*([A-Z0-9_]+),?');
     final Map<String, dynamic> replaced = <String, dynamic>{};
     for (final Match match in enumEntry.allMatches(headerFile)) {
       replaced[match.group(1)] = int.tryParse(match.group(2)) ?? match.group(2).replaceAll('GLFW_KEY_', '');
@@ -216,8 +216,8 @@
   List<Key> _readHidEntries(String input) {
     final List<Key> entries = <Key>[];
     final RegExp usbMapRegExp = RegExp(
-        r'''USB_KEYMAP\s*\(\s*0x([a-fA-F0-9]+),\s*0x([a-fA-F0-9]+),'''
-        r'''\s*0x([a-fA-F0-9]+),\s*0x([a-fA-F0-9]+),\s*0x([a-fA-F0-9]+),\s*"?([^\s]+?)"?,\s*([^\s]+?)\s*\)''',
+        r'USB_KEYMAP\s*\(\s*0x([a-fA-F0-9]+),\s*0x([a-fA-F0-9]+),'
+        r'\s*0x([a-fA-F0-9]+),\s*0x([a-fA-F0-9]+),\s*0x([a-fA-F0-9]+),\s*"?([^\s]+?)"?,\s*([^\s]+?)\s*\)',
         multiLine: true);
     final RegExp commentRegExp = RegExp(r'//.*$', multiLine: true);
     input = input.replaceAll(commentRegExp, '');
@@ -418,9 +418,9 @@
   @override
   String toString() {
     return """'$constantName': (name: "$name", usbHidCode: ${toHex(usbHidCode)}, """
-        '''linuxScanCode: ${toHex(linuxScanCode)}, xKbScanCode: ${toHex(xKbScanCode)}, '''
-        '''windowsKeyCode: ${toHex(windowsScanCode)}, macOsScanCode: ${toHex(macOsScanCode)}, '''
-        '''chromiumSymbolName: $chromiumName''';
+        'linuxScanCode: ${toHex(linuxScanCode)}, xKbScanCode: ${toHex(xKbScanCode)}, '
+        'windowsKeyCode: ${toHex(windowsScanCode)}, macOsScanCode: ${toHex(macOsScanCode)}, '
+        'chromiumSymbolName: $chromiumName';
   }
 
   /// Returns the static map of printable representations.
diff --git a/packages/flutter_tools/lib/src/android/gradle.dart b/packages/flutter_tools/lib/src/android/gradle.dart
index b52a99a..f959db1 100644
--- a/packages/flutter_tools/lib/src/android/gradle.dart
+++ b/packages/flutter_tools/lib/src/android/gradle.dart
@@ -641,8 +641,8 @@
     dependencies {''');
 
   for (final String buildMode in buildModes) {
-    globals.printStatus('''
-      ${buildMode}Implementation '$androidPackage:flutter_$buildMode:$buildNumber\'''');
+    globals.printStatus("""
+      ${buildMode}Implementation '$androidPackage:flutter_$buildMode:$buildNumber'""");
   }
 
   globals.printStatus('''