Fix spelling hexidecimal -> hexadecimal

Fixes #34460

Change-Id: I43ce8bbad9bfcc6b14c3a537ada84107e7bfaffe
Reviewed-on: https://dart-review.googlesource.com/74940
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Nate Bosch <nbosch@google.com>

Author: natebosch

pkg/analyzer/lib/src/dart/error/syntactic_errors.dart

@@ -451,7 +451,8 @@ class ParserErrorCode extends ErrorCode {
 
   static const ParserErrorCode INVALID_HEX_ESCAPE = const ParserErrorCode(
       'INVALID_HEX_ESCAPE',
-      "An escape sequence starting with '\\x' must be followed by 2 hexidecimal digits.");
+      "An escape sequence starting with '\\x' "
+      "must be followed by 2 hexadecimal digits.");
 
   static const ParserErrorCode INVALID_LITERAL_IN_CONFIGURATION =
       const ParserErrorCode('INVALID_LITERAL_IN_CONFIGURATION',
@@ -486,7 +487,7 @@ class ParserErrorCode extends ErrorCode {
   static const ParserErrorCode INVALID_UNICODE_ESCAPE = const ParserErrorCode(
       'INVALID_UNICODE_ESCAPE',
       "An escape sequence starting with '\\u' must be followed by 4 "
-      "hexidecimal digits or from 1 to 6 digits between '{' and '}'.");
+      "hexadecimal digits or from 1 to 6 digits between '{' and '}'.");
 
   static const ParserErrorCode LIBRARY_DIRECTIVE_NOT_FIRST =
       const ParserErrorCode('LIBRARY_DIRECTIVE_NOT_FIRST',

pkg/front_end/lib/src/fasta/fasta_codes_generated.dart

@@ -4628,7 +4628,7 @@ const MessageCode messageInvalidHexEscape = const MessageCode(
     "InvalidHexEscape",
     analyzerCode: "INVALID_HEX_ESCAPE",
     message:
-        r"""An escape sequence starting with '\x' must be followed by 2 hexidecimal digits.""");
+        r"""An escape sequence starting with '\x' must be followed by 2 hexadecimal digits.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeInvalidInitializer = messageInvalidInitializer;
@@ -4714,7 +4714,7 @@ const MessageCode messageInvalidUnicodeEscape = const MessageCode(
     "InvalidUnicodeEscape",
     analyzerCode: "INVALID_UNICODE_ESCAPE",
     message:
-        r"""An escape sequence starting with '\u' must be followed by 4 hexidecimal digits or from 1 to 6 digits between '{' and '}'.""");
+        r"""An escape sequence starting with '\u' must be followed by 4 hexadecimal digits or from 1 to 6 digits between '{' and '}'.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeInvalidUseOfNullAwareAccess =

pkg/front_end/lib/src/scanner/errors.dart

@@ -30,7 +30,7 @@ class ScannerErrorCode extends ErrorCode {
       const ScannerErrorCode('MISSING_DIGIT', "Decimal digit expected.");
 
   static const ScannerErrorCode MISSING_HEX_DIGIT = const ScannerErrorCode(
-      'MISSING_HEX_DIGIT', "Hexidecimal digit expected.");
+      'MISSING_HEX_DIGIT', "Hexadecimal digit expected.");
 
   static const ScannerErrorCode MISSING_IDENTIFIER =
       const ScannerErrorCode('MISSING_IDENTIFIER', "Expected an identifier.");

pkg/front_end/messages.yaml

@@ -897,14 +897,14 @@ InvalidCodePoint:
     - "'\\u{110000}'"
 
 InvalidHexEscape:
-  template: "An escape sequence starting with '\\x' must be followed by 2 hexidecimal digits."
+  template: "An escape sequence starting with '\\x' must be followed by 2 hexadecimal digits."
   analyzerCode: INVALID_HEX_ESCAPE
   expression:
     - "'\\x0'"
     - "'\\x0y'"
 
 InvalidUnicodeEscape:
-  template: "An escape sequence starting with '\\u' must be followed by 4 hexidecimal digits or from 1 to 6 digits between '{' and '}'."
+  template: "An escape sequence starting with '\\u' must be followed by 4 hexadecimal digits or from 1 to 6 digits between '{' and '}'."
   analyzerCode: INVALID_UNICODE_ESCAPE
   expression:
     - "'\\u'"

pkg/front_end/test/scanner_test.dart

@@ -302,11 +302,11 @@ abstract class ScannerTestBase {
     _assertToken(TokenType.HASH, "#");
   }
 
-  void test_hexidecimal() {
+  void test_hexadecimal() {
     _assertToken(TokenType.HEXADECIMAL, "0x1A2B3C");
   }
 
-  void test_hexidecimal_missingDigit() {
+  void test_hexadecimal_missingDigit() {
     _assertError(ScannerErrorCode.MISSING_HEX_DIGIT, 1, "0x");
   }