fix(pwsh): never output BOM for init scripts

.vscode/settings.json

@@ -25,5 +25,9 @@
     "editor.codeActionsOnSave": {
       "source.fixAll.markdownlint": "explicit"
     }
+  },
+  "files.encoding": "utf8",
+  "[powershell]": {
+    "files.encoding": "utf8"
   }
 }

src/shell/init.go

@@ -196,6 +196,9 @@ func generateScript(env runtime.Environment, feats Features) string {
 		return fmt.Sprintf("echo \"No initialization script available for %s\"", env.Flags().Shell)
 	}
 
+	// Remove UTF-8 BOM if present, as it can cause issues in some shells.
+	script = strings.TrimPrefix(script, "\xef\xbb\xbf")
+
 	init := strings.NewReplacer(
 		"::OMP::", executable,
 		"::SESSION_ID::", cache.SessionID(),

src/shell/scripts/omp.ps1

@@ -1,4 +1,4 @@
-# remove any existing dynamic module of OMP
+# remove any existing dynamic module of OMP
 if ($null -ne (Get-Module -Name "oh-my-posh-core")) {
     Remove-Module -Name "oh-my-posh-core" -Force
 }