fix(util): don't include filename in "Hidden Unicode" warning (renovatebot#41468)

fix(logger): don't include filename in "Hidden Unicode" warning

As noted in renovatebot#41467, if a repository has many files with these warnings,
the Dependency Dashboard can be flooded, which can reduce the utility,
especially if some of these may be false positives.

We can remove the filename from the WARN message, which will ensure that
only a single message is logged.

However, this will reduce the utility of the log message, as then users
need to check their logs to see the `file`.

Author: jamietanna

lib/util/fs/index.spec.ts

@@ -132,7 +132,7 @@ describe('util/fs/index', () => {
       // NOTE that we cannot test that this is called once across multiple `readLocalFile` as we're mocking the logger, so we're testing that it's called, not validating the nubmer of times
       expect(logger.logger.once.warn).toHaveBeenCalledWith(
         { file: 'file.txt', hiddenCharacters: '\\u00A0\\u200D' },
-        'Hidden Unicode characters have been discovered in the file `file.txt`. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)',
+        'Hidden Unicode characters have been discovered in file(s) in your repository. See your Renovate logs for more details. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)',
       );
     });
 
@@ -162,7 +162,7 @@ describe('util/fs/index', () => {
 
         expect(logger.logger.once.warn).toHaveBeenCalledWith(
           { file: 'example.csproj', hiddenCharacters: '\\uFEFF\\u200B' },
-          'Hidden Unicode characters have been discovered in the file `example.csproj`. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)',
+          'Hidden Unicode characters have been discovered in file(s) in your repository. See your Renovate logs for more details. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)',
         );
       });
     });

lib/util/git/index.spec.ts

@@ -615,7 +615,7 @@ describe('util/git/index', { timeout: 10000 }, () => {
 
       expect(logger.logger.once.warn).toHaveBeenCalledWith(
         { file: 'Dockerfile', hiddenCharacters: '\\u00A0' },
-        'Hidden Unicode characters have been discovered in the file `Dockerfile`. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)',
+        'Hidden Unicode characters have been discovered in file(s) in your repository. See your Renovate logs for more details. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)',
       );
     });
   });

lib/util/unicode.ts

@@ -23,7 +23,7 @@ export function logWarningIfUnicodeHiddenCharactersInPackageFile(
           file,
           hiddenCharacters: toUnicodeEscape(hiddenCharacters.join('')),
         },
-        `Hidden Unicode characters have been discovered in the file \`${file}\`. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)`,
+        `Hidden Unicode characters have been discovered in file(s) in your repository. See your Renovate logs for more details. Please confirm that they are intended to be there, as they could be an attempt to "smuggle" text into your codebase, or used to confuse tools like Renovate or Large Language Models (LLMs)`,
       );
     }
   }