Reword configuration file name exception text for clarity (fixes #481).

Author: DavidAnson

markdownlint-cli2.mjs

@@ -172,8 +172,9 @@ const readOptionsOrConfig = async (configPath, fs, noImport) => {
       config = await importModule(dirname, basename, noImport);
     } else {
       throw new Error(
-        "File name should be (or end with) one of the supported types " +
-        "(e.g., '.markdownlint.json' or 'example.markdownlint-cli2.jsonc')."
+        "Configuration file should be one of the supported names " +
+        "(e.g., '.markdownlint-cli2.jsonc') or a prefix with a supported name " +
+        "(e.g., 'example.markdownlint-cli2.jsonc')."
       );
     }
   } catch (error) {

test/markdownlint-cli2-test-cases.mjs

@@ -722,7 +722,7 @@ const testCases = ({
     "args": [ "--config", "cfg/unrecognized.jsonc", "**/*.md" ],
     "exitCode": 2,
     "stderrRe":
-      /Unable to use configuration file '[^']*cfg\/unrecognized\.jsonc'; File name should be \(or end with\) one of the supported types \(e\.g\., '\.markdownlint\.json' or 'example\.markdownlint-cli2\.jsonc'\)\./u,
+      /Unable to use configuration file '[^']*cfg\/unrecognized\.jsonc'; Configuration file should be one of the supported names \(e\.g\., '\.markdownlint-cli2\.jsonc'\) or a prefix with a supported name \(e\.g\., 'example\.markdownlint-cli2\.jsonc'\)\./u,
     "cwd": "config-files"
   });