Don't add literal double quote characters to filenames (#1984)

* Remove unnecessary spawnSync options.

The detached option defaults to false, and the cwd option defaults to
the current working directory, so there is no need to specify them.

* Don't retrieve spawnRes properties individually.

This isn't necessary and gives the misleading impression that stdout
and stderr may contain something. They cannot since the Docker image
is run with stdio: "inherit", meaning the stdio and stderr streams are
passed through to/from the mega-linter-runner process and hence aren't
captured.

* Don't add literal " character to filenames (#1942)

The extra quotes caused MegaLinter to fail to find the first and last
files in the list on non-Windows platforms, because the first has a
literal double quote character prepended to it, and the last has one
appended to it. Stop passing Windows arguments verbatim to eliminate
the need for the quotes on Windows.

Co-authored-by: nvuillam <nicolas.vuillamy@gmail.com>

CHANGELOG.md

@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 Note: Can be used with `oxsecurity/megalinter@beta` in your GitHub Action mega-linter.yml file, or with `oxsecurity/megalinter:beta` docker image
 
 - New [cupcake flavor](https://oxsecurity.github.io/megalinter/beta/flavors/cupcake/#readme) with 78 instead of 108 linters
+- Don't add literal double quote character to filenames in mega-linter-runner ([#1942](https://github.com/oxsecurity/megalinter/issues/1942)).
 - Remove default npm-groovy-lint extra arguments ([#1872](https://github.com/oxsecurity/megalinter/issues/1872))
 
 - Linter versions upgrades

mega-linter-runner/lib/runner.js

@@ -151,20 +151,17 @@ ERROR: Docker engine has not been found on your system.
     if ((options._ || []).length > 0) {
       commandArgs.push(
         ...["-e"],
-        `MEGALINTER_FILES_TO_LINT="${options._.join(",")}"`
+        `MEGALINTER_FILES_TO_LINT=${options._.join(",")}`
       );
     }
     commandArgs.push(dockerImage);
 
     // Call docker run
     console.log(`Command: docker ${commandArgs.join(" ")}`);
     const spawnOptions = {
-      detached: false,
-      cwd: process.cwd(),
       env: Object.assign({}, process.env),
       stdio: "inherit",
       windowsHide: true,
-      windowsVerbatimArguments: true,
     };
     const spawnRes = spawnSync("docker", commandArgs, spawnOptions);
     // Output json if requested
@@ -179,11 +176,7 @@ ERROR: Docker engine has not been found on your system.
         console.log(JSON.stringify(JSON.parse(jsonRaw)));
       }
     }
-    return {
-      status: spawnRes.status,
-      stdout: spawnRes.stdout,
-      stderr: spawnRes.stderr,
-    };
+    return spawnRes;
   }
 
   isv4(release) {