fix(fatfs): typos and spelling (#9131)

See #8593

@vates/fatfs/helpers.js

@@ -62,7 +62,7 @@ exports.parseFlags = function (flags) {
         case 'ax':  info = {read:false, write:true, create:true, append:true, exclusive:true}; break;
         case 'a+':  info = {read:true, write:true, create:true, append:true}; break;
         case 'ax+': info = {read:true, write:true, create:true, append:true, exclusive:true}; break;
-        default: throw Error("Uknown mode: "+flags);       // TODO: throw as `S.err.INVAL`
+        default: throw Error("Unknown mode: "+flags);       // TODO: throw as `S.err.INVAL`
     }
     if (info.sync) throw Error("Mode not implemented.");    // TODO: what would this require of us?
     if (_dir) info._openDir = true;

@vates/fatfs/test.js

@@ -90,7 +90,7 @@ function startTests(vol, waitTime) {
                 assert(path === file, "Fixed fluffy path matches normal one.");
             });
             fs.realpath([BASE_DIR,"non","existent","path"].join('/'), function (e) {
-                assert(e, "Expected error calling fs.realpath on non-existent file.");
+                assert(e, "Expected error calling fs.realpath on nonexistent file.");
             });
             
             fs.readdir(BASE_DIR, function (e, arr) {

CHANGELOG.unreleased.md

@@ -105,6 +105,7 @@
 
 <!--packages-start-->
 
+- @vates/fatfs patch
 - @vates/generator-toolbox minor
 - @vates/types minor
 - @xen-orchestra/backups minor