Replace 'ascii' encoding for non-binary files with 'utf-8' encoding #122
Description
There is a distinction between text and binary files in the filestream methods of Grease. Text files are considered to use the 'ascii' encoding when reading/writing them in Grease. However, text files are nowadays commonly using/requiring utf8 encoding. See issue in SeasideSt/Seaside#1273
It's probably acceptable to use utf8 for text files because:
- utf8 is backwards compatible with ascii encoding
- Pharo uses utf8 for internal string encoding
Leaves me with the quibble that utf8 encoded files are actually binary files, so this difference between 'text' and 'binary' files leaves me wondering if this still makes sense...