Add new rule for mit

[alok1304]

Now we detects the correct license expression i.e mit.

Fixes #3860
Fixes #3861

Tasks

• Reviewed contribution guidelines
• PR is descriptively titled 📑 and links the original issue above 🔗
• Tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR
  Run tests locally to check for errors.
• Commits are in uniquely-named feature branch and has no merge conflicts 📁
• Updated documentation pages (if applicable)
• Updated CHANGELOG.rst (if applicable)

Signed-off-by: Alok Kumar [email protected]

[alok1304]

@pombredanne can you please review this PR, Now there is no bug. We detects correct mit license Expression.

Eg:

  "files": [
    {
      "path": "_context.py",
      "type": "file",
      "detected_license_expression": "mit",
      "detected_license_expression_spdx": "MIT",
      "license_detections": [
        {
          "license_expression": "mit",
          "license_expression_spdx": "MIT",
          "matches": [
            {
              "license_expression": "mit",
              "license_expression_spdx": "MIT",
              "from_file": "_context.py",
              "start_line": 2,
              "end_line": 2,
              "matcher": "2-aho",
              "score": 100.0,
              "matched_length": 10,
              "match_coverage": 100.0,
              "rule_relevance": 100,
              "rule_identifier": "mit_1351.RULE",
              "rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/mit_1351.RULE",
              "matched_text": "# MIT License (see LICENSE or https://opensource.org/licenses/MIT)",
              "matched_text_diagnostics": "MIT License (see LICENSE or https://opensource.org/licenses/MIT)"
            }
          ],
          "identifier": "mit-cf1210d2-5820-2542-c850-cac164e24fed"
        }
      ],
      "license_clues": [],
      "percentage_of_license_text": 0.24,
      "scan_errors": []
    }
  ]

This new rule fixes two bugs that are facing in #3861 and #3860.

Hope this helps.