Fixes microsoft#132162 by adding \b to brackets that use letters. Uses same logic as existing bracket matching code.

Author: hediet

src/vs/editor/common/model/bracketPairs/impl/brackets.ts

@@ -74,7 +74,7 @@ export class BracketTokens {
 			const keys = [...this.map.keys()];
 			keys.sort();
 			keys.reverse();
-			return keys.map(k => escapeRegExpCharacters(k)).join('|');
+			return keys.map(k => prepareBracketForRegExp(k)).join('|');
 		}
 	}
 
@@ -99,6 +99,13 @@ export class BracketTokens {
 	}
 }
 
+function prepareBracketForRegExp(str: string): string {
+	const escaped = escapeRegExpCharacters(str);
+	// This bracket pair uses letters like e.g. "begin" - "end" (see https://github.com/microsoft/vscode/issues/132162)
+	const needsWordBoundaries = (/^[\w ]+$/.test(str));
+	return (needsWordBoundaries ? `\\b${escaped}\\b` : escaped);
+}
+
 export class LanguageAgnosticBracketTokens {
 	private readonly languageIdToBracketTokens = new Map<string, BracketTokens>();