Update docs about NBSP (#834)

CHANGELOG.md

@@ -26,6 +26,7 @@ This can also be enabled programmatically with `warnings.simplefilter('default',
 - [`FPDF.table()`](https://pyfpdf.github.io/fpdf2/fpdf/fpdf.html#fpdf.fpdf.FPDF.table): the `colspan` setting has been fixed - [documentation](https://pyfpdf.github.io/fpdf2/Tables.html#column-span)
 - [`FPDF.image()`](https://pyfpdf.github.io/fpdf2/fpdf/fpdf.html#fpdf.fpdf.FPDF.image): allowing images path starting with `data` to be passed as input
 - the initial text color is preserved when using `FPDF.write_html()` - _cf._ [issue #846](https://github.com/PyFPDF/fpdf2/issues/846)
+- variable-width non-breaking space support [issue #834](https://github.com/PyFPDF/fpdf2/issues/834)
 ### Deprecated
 - the `center` optional parameter of [`FPDF.cell()`](https://pyfpdf.github.io/fpdf2/fpdf/fpdf.html#fpdf.fpdf.FPDF.cell) is **no more** deprecated, as it allows for horizontal positioning, which is different from text alignment control with `align="C"`
 

docs/Text.md

@@ -32,8 +32,9 @@ fixed_text = get_display(reshape(some_text))
 ```
 
 ### Character or Word Based Line Wrapping
-By default, `multi_line()` and `write()` will wrap lines based on words, using space characters and soft hyphens as seperators.
-For languages like Chinese and Japanese, that don't usually seperate their words, character based wrapping is more appropriate.
+By default, `multi_line()` and `write()` will wrap lines based on words, using space characters and soft hyphens as separators.
+Non-breaking spaces (\U00a0) do not trigger a word wrap, but are otherwise treated exactly as a normal space character.
+For languages like Chinese and Japanese, that don't usually separate their words, character based wrapping is more appropriate.
 In such a case, the argument `wrapmode="CHAR"` can be used (the default is "WORD"), and each line will get broken right before the
 character that doesn't fit anymore.