Some debugging and polish needed.

Some variables need tweaking.
Needs testing.
Code reuse unsatisfactory.

Some variables need tweaking.
Needs testing.
Code reuse unsatisfactory.

Potentially significant issues with tests:
1. test_html_ln_outside_p - IndexError: list index out of range.
2. test_html_ol_ul_line_height - actual distance between lines differs slightly from expected.

Code reuse unsatisfactory.

Need feedback for handling <dd> and <blockquote>.

Potentially significant issues with tests:
1. test_html_ol_ul_line_height - actual distance between lines differs slightly from expected.

Need feedback for whether or not the new indentation that contradicts old tests is satisfactory.

Code reuse unsatisfactory.
Need feedback.

Bug present: bullets are made one per line instead of one per paragraph.
Saving progress before introducing a `Bullet` class.

Feature implemented.
Testing and adjustments of tests needed.

Prevented from `Paragraph.top_margin` being added to `pdf.y` of first lines of paragraphs with bullets.

Prevented from `Paragraph.top_margin` being added to `pdf.y` of first lines of paragraphs with bullets.
`<ul>` and `<ol>` tags now cause a creation of a paragraph with the string `\n` being used to generate a fragment of the height `list_pseudo_margin`.
Adjusted defaults for `li_tag_indent`.

Changed `Paragraph.generate_bullet_frag()` into `generate_bullet_frag_and_tl`, and made it also generate the bullet text line.
Dealing with the issue of inappropriately large distance between `<dt>` and their child `<dd>` elements when `Paragraph.top_margin` is 0.

Changed `Paragraph.generate_bullet_frag()` into `generate_bullet_frag_and_tl`, and made it also generate the bullet text line.

# Conflicts:
#	fpdf/html.py

Adjusted old tests.

…`list_vertical_margin`.

Removed the `MultiLineBreak.indent` attribute.
Added a test for long `<ol>` bullets.

…ic purposes.

# Conflicts:
#	CHANGELOG.md

…_bullet_frag_and_tl`.

…_bullet_frag_and_tl`.

# Conflicts:
#	fpdf/text_region.py

…ags_and_tl` method and in the `Bullet` class.

Edited `TextRegion.md` to reflect the introduced changes for `Paragraph`s.
Added tests for `Paragraph` generation in `test_html.py`

# Conflicts:
#	CHANGELOG.md
#	test/html/html_features.pdf

…margin values in `html.py` to the chosen document unit of measurement.

Adjusted default tag indent values.
Moved the `Paragraph` docstring to the `ParagraphCollectorMixin.paragraph()` method.
Changed the `CustomPDF` class in `test_html_customize_ul` to have non-static attributes `li_tag_indent` and `ul_bullet_char`.
Adjusted tests.

Minor changes to HTML contents of `test_html_measurement_units()`.

…associated class attributes and docstring mentions to `bullet_r_margin`, `bullet_t_margin`, `bullet.r_margin`, `bullet.t_margin`.

… `dd_tag_indent` in `html.py`.

`bullet_t_margin` and associated variables removed.
`li_tag_indent` and `dd_tag_indent` default values are changed to None.
Changes to `test_html_measurement_units` not included.

Added `test_html_list_vertical_margin`.
Fixed the non-assignment of `HTML2FPDF.list_vertical_margin` when the constructor argument `list_vertical_margin` is not None.

…agraph()`. Updated relevant docstring and `TextRegion.md` documentation.

Adjusted `test_bulleted_paragraphs` to remove mentions of `rel_y_displacement`, changed instances of string `"rel_x_displacement"` to `bullet_r_margin` and introduced usage of `case["bullet_r_margin"]` in the test.

# Conflicts:
#	test/html/html_customize_ul.pdf
#	test/html/test_html.py

Correctly this time.