Update README.md

README.md

@@ -21,6 +21,7 @@ The code is (still) work in progress, please report if you find any issues.
  - error markers: the user can specify a list of error messages together the line of occurence, the editor will highligh the lines with red backround and display error message in a tooltip when the mouse cursor is hovered over the line
  - large files: there is no explicit limit set on file size or number of lines (below 2GB, performance is not affected when large files are loaded (except syntax coloring, see below)
  - color palette support: you can switch between different color palettes, or even define your own
+ - whitespace indicators (TAB, space)
 
 # Known issues
  - syntax highligthing of most languages - except C/C++ - is based on std::regex, which is diasppointingly slow. Because of that, the highlighting process is amortized between multiple frames. C/C++ has a hand-written tokenizer which is much faster.