[Github-comments] [geany/geany] Invisible umlaut dots with font Hack and font size 10 (#2854)

[Thomas Lange]

**Bug description**

Geany does not show the two dots on Umlaut characters like Ä Ö Ü when using the 
font [Hack](https://github.com/source-foundry/Hack) with font size 10.
Only this size and only capitalized characters are affected.

Other applications like a xfce4-terminal or LibreOffice show the dots with the 
same font and font size.
Is Geany responsible for the font rendering? May this be a bug in Scintilla?

**Screenshots**

Default settings
![Dots-missing](https://user-images.githubusercontent.com/1301412/126917642-bdbb358c-e220-4a07-a392-80086185a91c.png)

Increased line heights
![Dots-visible](https://user-images.githubusercontent.com/1301412/126917650-c09b72c3-28df-47aa-bd1f-c4ae590858b7.png)

**System**
- Arch Linux
- Geany 1.37.1
- GTK 3.24.24
- ttf-hack 3.003

**Workaround**
Increasing the line height (see 
[FAQ](https://www.geany.org/documentation/faq/#geany-does-not-display-underscores-anymore))
 or using another font helps.


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