Add remarks to test case file

Author: rbuckton

tests/baselines/reference/regularExpressionWithNonBMPFlags.errors.txt

@@ -1,12 +1,18 @@
-regularExpressionWithNonBMPFlags.ts(1,23): error TS1499: Unknown regular expression flag.
-regularExpressionWithNonBMPFlags.ts(1,25): error TS1499: Unknown regular expression flag.
-regularExpressionWithNonBMPFlags.ts(1,28): error TS1499: Unknown regular expression flag.
-regularExpressionWithNonBMPFlags.ts(1,41): error TS1499: Unknown regular expression flag.
-regularExpressionWithNonBMPFlags.ts(1,43): error TS1499: Unknown regular expression flag.
-regularExpressionWithNonBMPFlags.ts(1,45): error TS1499: Unknown regular expression flag.
+regularExpressionWithNonBMPFlags.ts(7,23): error TS1499: Unknown regular expression flag.
+regularExpressionWithNonBMPFlags.ts(7,25): error TS1499: Unknown regular expression flag.
+regularExpressionWithNonBMPFlags.ts(7,28): error TS1499: Unknown regular expression flag.
+regularExpressionWithNonBMPFlags.ts(7,41): error TS1499: Unknown regular expression flag.
+regularExpressionWithNonBMPFlags.ts(7,43): error TS1499: Unknown regular expression flag.
+regularExpressionWithNonBMPFlags.ts(7,45): error TS1499: Unknown regular expression flag.
 
 
 ==== regularExpressionWithNonBMPFlags.ts (6 errors) ====
+    // The characters in the following regular expression are ASCII-lookalike characters found in Unicode, including:
+    // - 𝘴 (U+1D634 Mathematical Sans-Serif Italic Small S)
+    // - 𝘪 (U+1D62A Mathematical Sans-Serif Italic Small I)
+    // - 𝘮 (U+1D62E Mathematical Sans-Serif Italic Small M)
+    //
+    // See https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
     const 𝘳𝘦𝘨𝘦𝘹 = /(?𝘴𝘪-𝘮:^𝘧𝘰𝘰.)/𝘨𝘮𝘶;
                           ~~
 !!! error TS1499: Unknown regular expression flag.

tests/baselines/reference/regularExpressionWithNonBMPFlags.js

@@ -1,8 +1,20 @@
 //// [tests/cases/compiler/regularExpressionWithNonBMPFlags.ts] ////
 
 //// [regularExpressionWithNonBMPFlags.ts]
+// The characters in the following regular expression are ASCII-lookalike characters found in Unicode, including:
+// - 𝘴 (U+1D634 Mathematical Sans-Serif Italic Small S)
+// - 𝘪 (U+1D62A Mathematical Sans-Serif Italic Small I)
+// - 𝘮 (U+1D62E Mathematical Sans-Serif Italic Small M)
+//
+// See https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
 const 𝘳𝘦𝘨𝘦𝘹 = /(?𝘴𝘪-𝘮:^𝘧𝘰𝘰.)/𝘨𝘮𝘶;
 
 
 //// [regularExpressionWithNonBMPFlags.js]
+// The characters in the following regular expression are ASCII-lookalike characters found in Unicode, including:
+// - 𝘴 (U+1D634 Mathematical Sans-Serif Italic Small S)
+// - 𝘪 (U+1D62A Mathematical Sans-Serif Italic Small I)
+// - 𝘮 (U+1D62E Mathematical Sans-Serif Italic Small M)
+//
+// See https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
 const 𝘳𝘦𝘨𝘦𝘹 = /(?𝘴𝘪-𝘮:^𝘧𝘰𝘰.)/𝘨𝘮𝘶;

tests/baselines/reference/regularExpressionWithNonBMPFlags.symbols

@@ -1,6 +1,12 @@
 //// [tests/cases/compiler/regularExpressionWithNonBMPFlags.ts] ////
 
 === regularExpressionWithNonBMPFlags.ts ===
+// The characters in the following regular expression are ASCII-lookalike characters found in Unicode, including:
+// - 𝘴 (U+1D634 Mathematical Sans-Serif Italic Small S)
+// - 𝘪 (U+1D62A Mathematical Sans-Serif Italic Small I)
+// - 𝘮 (U+1D62E Mathematical Sans-Serif Italic Small M)
+//
+// See https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
 const 𝘳𝘦𝘨𝘦𝘹 = /(?𝘴𝘪-𝘮:^𝘧𝘰𝘰.)/𝘨𝘮𝘶;
->𝘳𝘦𝘨𝘦𝘹 : Symbol(𝘳𝘦𝘨𝘦𝘹, Decl(regularExpressionWithNonBMPFlags.ts, 0, 5))
+>𝘳𝘦𝘨𝘦𝘹 : Symbol(𝘳𝘦𝘨𝘦𝘹, Decl(regularExpressionWithNonBMPFlags.ts, 6, 5))
 

tests/baselines/reference/regularExpressionWithNonBMPFlags.types

@@ -1,6 +1,12 @@
 //// [tests/cases/compiler/regularExpressionWithNonBMPFlags.ts] ////
 
 === regularExpressionWithNonBMPFlags.ts ===
+// The characters in the following regular expression are ASCII-lookalike characters found in Unicode, including:
+// - 𝘴 (U+1D634 Mathematical Sans-Serif Italic Small S)
+// - 𝘪 (U+1D62A Mathematical Sans-Serif Italic Small I)
+// - 𝘮 (U+1D62E Mathematical Sans-Serif Italic Small M)
+//
+// See https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
 const 𝘳𝘦𝘨𝘦𝘹 = /(?𝘴𝘪-𝘮:^𝘧𝘰𝘰.)/𝘨𝘮𝘶;
 >𝘳𝘦𝘨𝘦𝘹 : RegExp
 >           : ^^^^^^

tests/cases/compiler/regularExpressionWithNonBMPFlags.ts

@@ -1,3 +1,9 @@
 // @target: esnext
 
+// The characters in the following regular expression are ASCII-lookalike characters found in Unicode, including:
+// - 𝘴 (U+1D634 Mathematical Sans-Serif Italic Small S)
+// - 𝘪 (U+1D62A Mathematical Sans-Serif Italic Small I)
+// - 𝘮 (U+1D62E Mathematical Sans-Serif Italic Small M)
+//
+// See https://en.wikipedia.org/wiki/Mathematical_Alphanumeric_Symbols
 const 𝘳𝘦𝘨𝘦𝘹 = /(?𝘴𝘪-𝘮:^𝘧𝘰𝘰.)/𝘨𝘮𝘶;