Displaying some symbols break the horizontal and vertical alignment of lines.
I noticed it using NERDTree in Vim which uses some symbols to display if folders are opened or closed and file icons.
Without NERDTree opened:

With NERDTree opened:

Notice how the vertical bar gets skewed and the line numbers are misaligned.
Opening and closing folders in NERDTree breaks different parts of the layout
Displaying some symbols break the horizontal and vertical alignment of lines.
I noticed it using NERDTree in Vim which uses some symbols to display if folders are opened or closed and file icons.
Without NERDTree opened:


With NERDTree opened:
Notice how the vertical bar gets skewed and the line numbers are misaligned.
Opening and closing folders in NERDTree breaks different parts of the layout