[SakarPaisen]

What

Closes #10.

analyze_text now reports characters_without_whitespace alongside the existing characters count. It counts every character for which str.isspace() is false, so punctuation and digits still count and spaces, tabs, newlines and a Unicode non-breaking space do not.

>>> analyze_text("Hi there!\n")
{"characters": 10, "characters_without_whitespace": 8, "words": 2, ...}

Scope

• src/mcp_tools_lab/tools/text.py — one new field plus a docstring note.
• tests/test_text.py — updated the exact-result assertion for empty text and added three focused tests.
• docs/tool-guide.md — documents the new field.
• No server, dependency or other tool changes. All existing fields keep their current values.

Tests added

• Documented example: "Hi there!\n" → characters=10, characters_without_whitespace=8.
• Punctuation and digits still count: "a, 1\tb" → characters=6, characters_without_whitespace=4.
• Whitespace only: " \t\r\n\u00a0" → characters=5, characters_without_whitespace=0, words=0.

Checks

• python -m pytest tests/test_text.py -q — 6 passed
• python -m pytest -q — 65 passed
• python examples/try_tools.py — runs, shows the new field
• python .github/scripts/check_rules.py — Scanned 11 files under src/ for print() and network imports: OK

Python: 3.13 on Windows 11.

Note on issue choice: #1 ("Count empty lines") already has a claim comment from another contributor and is not assigned, so per contributions.md ("wait for a maintainer to confirm if the issue is already claimed") I took this separate starter task instead. Happy to hold both until a maintainer confirms.

(Full disclosure: I used an AI coding assistant for this change, and I reviewed and verified everything submitted here.)