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The default QTextEdit behavior is following: - the current char format corresponds to the symbol right _before_ the cursor position. - if the cursor is at the start of the block, the format is grabbed from the symbol _after_ the cursor. It works well with standard formatting (bold, underline, etc), which can easily be enabled / disabled using corresponding QActions. Note that the behavior is also the same for, say, LibreOffice. However, it does not work well with hyperlinks. If the document ends with a link, it is virtually impossible to start typing normal text right after this link (i.e. to reset the char format). The only way to do it is to use copy-paste (i.e. paste some normal text, preserving formatting), which is quite frustrating. For the same reason it's not easy to write some text right after hyperlink. I believe it's the reason behind this tiny whitespace in `insertHtml` inside richTextComposer. The workaround is following: alter the default behiour and take the character format from symbol right _after_ the link if the cursor points at the end of the link (this is also the way LibreOffice behaves).
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