False positive: gpl-2.0-plus and other-copyleft detected in standard GPL-2.0 file header

## Description

When scanning a file with a standard GPL-2.0 header, scancode-toolkit generates two false positive detections in addition to the correct `gpl-2.0` match.

The scanned file is: https://github.com/pycrate-org/pycrate/blob/master/tools/pycrate_asn1compile.py

**Detection 1 (correct):**
- `license_expression`: `gpl-2.0`
- `score`: 100.0, lines 11–18

**Detection 2 (false positive):**
- `license_expression`: `gpl-2.0-plus`
- `score`: 34.21, lines 20–22
- Rule: `gpl-2.0-plus_513.RULE`
- The phrase "License version 2 in the `license.txt` file **or**" is incorrectly matched as GPL-2.0-or-later. The word "or" here introduces an alternative way to obtain the license text, not a version flexibility clause.

**Detection 3 (false positive):**
- `license_expression`: `other-copyleft`
- `score`: 90.0, lines 22–23
- Rule: `other-copyleft_fsf_address_1.RULE`
- The FSF mailing address (`Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA`) is a standard boilerplate reference, not an independent license declaration.

## Raw scancode output (relevant excerpt)

```json
{
"license_detections": [
{
"license_expression": "gpl-2.0",
"license_expression_spdx": "GPL-2.0-only",
"from_file": "pycrate-master/tools/pycrate_asn1compile.py",
"start_line": 11,
"end_line": 18,
"matcher": "2-aho",
"score": 100.0,
"matched_length": 68,
"match_coverage": 100.0,
"rule_relevance": 100,
"rule_identifier": "gpl-2.0_121.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/gpl-2.0_121.RULE"
},
{
"license_expression": "gpl-2.0-plus",
"license_expression_spdx": "GPL-2.0-or-later",
"from_file": "pycrate-master/tools/pycrate_asn1compile.py",
"start_line": 20,
"end_line": 22,
"matcher": "3-seq",
"score": 34.21,
"matched_length": 13,
"match_coverage": 34.21,
"rule_relevance": 100,
"rule_identifier": "gpl-2.0-plus_513.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/gpl-2.0-plus_513.RULE"
},
{
"license_expression": "other-copyleft",
"license_expression_spdx": "LicenseRef-scancode-other-copyleft",
"from_file": "pycrate-master/tools/pycrate_asn1compile.py",
"start_line": 22,
"end_line": 23,
"matcher": "2-aho",
"score": 90.0,
"matched_length": 14,
"match_coverage": 100.0,
"rule_relevance": 90,
"rule_identifier": "other-copyleft_fsf_address_1.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/other-copyleft_fsf_address_1.RULE"
}
]
}
```

The relevant lines (20–23) are:
```
# * You will find a copy of the terms and conditions of the GNU General Public
# * License version 2 in the "license.txt" file or
# * see http://www.gnu.org/licenses/ or write to the Free Software Foundation,
# * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
```

## System Configuration

- OS: Windows 10
- ScanCode version: 32.5.0
- Python version: 3.14.5

## Steps to Reproduce

1. Clone: https://github.com/pycrate-org/pycrate
2. Run: `scancode --license --copyright --json-pp result.json ./`
3. Inspect detections for `tools/pycrate_asn1compile.py`

## Expected Behavior

Only one detection: `gpl-2.0` with high confidence (lines 11–18).