First major update to notes/gitNotes in long time
First major update to notes/gitNotes in long time

 - more info on git diff
 - explained what HEAD is
   - I need to better understand what the "index" is
 - limited info on git-restore
   - need to research git-restore more
   - will start from: git restore --help
 - fortmatting changes
   - shell commands indicated consistently with '$ '
   - more consistent with other text files in repo
   - considering converting to markdown

grscheller/scheller-linux-archive,grscheller/scheller-linux-archive,grscheller/scheller-linux-archive,grscheller/scheller-linux-archive,grscheller/scheller-linux-archive,grscheller/scheller-linux-archive,grscheller/scheller-linux-archive,grscheller/scheller-linux-archive