diff --git a/internal/cli/ask_credentials.go b/internal/cli/ask_credentials.go
index a4264a9b..0594cc44 100644
--- a/internal/cli/ask_credentials.go
+++ b/internal/cli/ask_credentials.go
@@ -5,6 +5,7 @@ package cli // import "miniflux.app/v2/internal/cli"
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -16,7 +17,7 @@ func askCredentials() (string, string) {
 	fd := int(os.Stdin.Fd())
 
 	if !term.IsTerminal(fd) {
-		printErrorAndExit(fmt.Errorf("this is not an interactive terminal, exiting"))
+		printErrorAndExit(errors.New("this is not an interactive terminal, exiting"))
 	}
 
 	fmt.Print("Enter Username: ")
@@ -30,6 +31,6 @@ func askCredentials() (string, string) {
 	defer term.Restore(fd, state)
 	bytePassword, _ := term.ReadPassword(fd)
 
-	fmt.Printf("\n")
+	fmt.Print("\n")
 	return strings.TrimSpace(username), strings.TrimSpace(string(bytePassword))
 }
diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index d15beb19..14c38fda 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -263,6 +263,6 @@ func Parse() {
 }
 
 func printErrorAndExit(err error) {
-	fmt.Fprintf(os.Stderr, "%v\n", err)
+	fmt.Fprintln(os.Stderr, err)
 	os.Exit(1)
 }
diff --git a/internal/googlereader/handler.go b/internal/googlereader/handler.go
index ce22c836..28090b5b 100644
--- a/internal/googlereader/handler.go
+++ b/internal/googlereader/handler.go
@@ -793,7 +793,7 @@ func (h *handler) streamItemContentsHandler(w http.ResponseWriter, r *http.Reque
 				Content:   entry.Content,
 			},
 			Origin: contentItemOrigin{
-				StreamID: fmt.Sprintf("feed/%d", entry.FeedID),
+				StreamID: fmt.Sprintf(feedPrefix+"%d", entry.FeedID),
 				Title:    entry.Feed.Title,
 				HTMLUrl:  entry.Feed.SiteURL,
 			},
diff --git a/internal/integration/karakeep/karakeep.go b/internal/integration/karakeep/karakeep.go
index 32372c83..7410f374 100644
--- a/internal/integration/karakeep/karakeep.go
+++ b/internal/integration/karakeep/karakeep.go
@@ -50,7 +50,7 @@ func (c *Client) SaveURL(entryURL string) error {
 		return fmt.Errorf("karakeep: unable to create request: %v", err)
 	}
 
-	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", c.apiToken))
+	req.Header.Set("Authorization", "Bearer "+c.apiToken)
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("User-Agent", "Miniflux/"+version.Version)
 
diff --git a/internal/integration/ntfy/ntfy.go b/internal/integration/ntfy/ntfy.go
index 92f906f0..6b965412 100644
--- a/internal/integration/ntfy/ntfy.go
+++ b/internal/integration/ntfy/ntfy.go
@@ -90,7 +90,7 @@ func (c *Client) makeRequest(payload any) error {
 
 	// See https://docs.ntfy.sh/publish/#access-tokens
 	if c.ntfyApiToken != "" {
-		request.Header.Set("Authorization", fmt.Sprintf("Bearer %s", c.ntfyApiToken))
+		request.Header.Set("Authorization", "Bearer "+c.ntfyApiToken)
 	}
 
 	// See https://docs.ntfy.sh/publish/#username-password
diff --git a/internal/ui/proxy.go b/internal/ui/proxy.go
index 8e9ee787..23658a08 100644
--- a/internal/ui/proxy.go
+++ b/internal/ui/proxy.go
@@ -140,7 +140,7 @@ func (h *handler) mediaProxy(w http.ResponseWriter, r *http.Request) {
 		b.WithHeader("Content-Type", resp.Header.Get("Content-Type"))
 
 		if filename := path.Base(parsedMediaURL.Path); filename != "" {
-			b.WithHeader("Content-Disposition", fmt.Sprintf(`inline; filename="%s"`, filename))
+			b.WithHeader("Content-Disposition", `inline; filename="`+filename+`"`)
 		}
 
 		forwardedResponseHeader := [...]string{"Content-Encoding", "Content-Type", "Content-Length", "Accept-Ranges", "Content-Range"}