FIX BrailleConverter: semicolon mapped to the wrong braille cell

[WatchTree-19]

Description

The BrailleConverter character map encodes the semicolon as ⠰ (dots 5,6). That cell is the letter-sign / grade-1 indicator, not a semicolon. English Braille — and UEB, and the French and German codes — all encode the semicolon as dots 2,3 = ⠆ (⠆).

Every other punctuation mark in the same map already follows the standard:

char	current cell	dots	correct?
,	⠂	2	✓
:	⠒	2,5	✓
.	⠲	2,5,6	✓
!	⠖	2,3,5	✓
?	⠦	2,3,6	✓
;	⠰	5,6	✗ should be 2,3 (⠆)

So this is an isolated transcription error, not a code-variant choice. Effect: any ; in a prompt was converted to the wrong braille character (the reader sees a grade-1 indicator instead of a semicolon).

Fix

One-character map correction, ; → ⠆.

Tests

The existing braille tests only assert the output is non-empty, so the wrong cell passed unnoticed. Added test_braille_converter_punctuation_cells, which pins the exact braille cell for each punctuation mark. It fails on the old value:

AssertionError: ';' -> '⠰' (U+2830), expected '⠆' (U+2806)

and passes after the fix. Full braille suite: 10 passed. ruff check and ruff format --check clean.

[romanlutz]

Thank you!

[romanlutz]

@WatchTree-19 please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

Options:

• (default - no company specified) I have sole ownership of intellectual property rights to my Submissions and I am not making Submissions in the course of work for my employer.

@microsoft-github-policy-service agree

• (when company given) I am making Submissions in the course of work for my employer (or my employer has intellectual property rights in my Submissions by contract or applicable law). I have permission from my employer to make Submissions and enter into this Agreement on behalf of my employer. By signing below, the defined term “You” includes me and my employer.

@microsoft-github-policy-service agree company="Microsoft"

Contributor License Agreement

@WatchTree-19 you need to accept the CLA if you want the contribution to get merged. Please check the terms to see if you agree.

[WatchTree-19]

@microsoft-github-policy-service agree