fix some errors, mainly gramatical ones
tree798b15f68330630872a5e3fa0f671afc358e8462
-rw-r--r-- 96 .gitignore
drwxr-xr-x - .reuse
drwxr-xr-x - LICENSES
-rw-r--r-- 1402 README.md
-rw-r--r-- 694 book.toml
drwxr-xr-x - src
drwxr-xr-x - tasks