diff --git a/vlib/flag/flag.v b/vlib/flag/flag.v
index 9e76ed28a7..f2c07f0ae3 100644
--- a/vlib/flag/flag.v
+++ b/vlib/flag/flag.v
@@ -51,9 +51,11 @@ fn (mut f Flag) free() {
 
 // str returns a string representation of the given Flag
 pub fn (f Flag) str() string {
-	return '' + '    flag:\n' + '            name: ${f.name}\n' +
-		'            abbr: `${f.abbr.ascii_str()}`\n' + '            usage: ${f.usage}\n' +
-		'            desc: ${f.val_desc}'
+	return '    flag:
+            name: ${f.name}
+            abbr: `${f.abbr.ascii_str()}`
+            usage: ${f.usage}
+            desc: ${f.val_desc}'
 }
 
 // str returns a string representation of the given array of Flags
diff --git a/vlib/gg/text_rendering.c.v b/vlib/gg/text_rendering.c.v
index c0c2d15927..7ceef912ad 100644
--- a/vlib/gg/text_rendering.c.v
+++ b/vlib/gg/text_rendering.c.v
@@ -56,10 +56,10 @@ fn new_ft(c FTConfig) ?&FT {
 			fons.set_error_callback(clear_atlas_callback, fons)
 			return &FT{
 				fons:        fons
-				font_normal: fons.add_font_mem('sans', bytes_normal, false)
-				font_bold:   fons.add_font_mem('sans', bytes_bold, false)
-				font_mono:   fons.add_font_mem('sans', bytes_mono, false)
-				font_italic: fons.add_font_mem('sans', bytes_italic, false)
+				font_normal: fons.add_font_mem('sans', bytes_normal.clone(), false)
+				font_bold:   fons.add_font_mem('sans', bytes_bold.clone(), false)
+				font_mono:   fons.add_font_mem('sans', bytes_mono.clone(), false)
+				font_italic: fons.add_font_mem('sans', bytes_italic.clone(), false)
 				scale:       c.scale
 			}
 		} else {
@@ -122,10 +122,10 @@ fn new_ft(c FTConfig) ?&FT {
 	fons.set_error_callback(clear_atlas_callback, fons)
 	return &FT{
 		fons:        fons
-		font_normal: fons.add_font_mem('sans', bytes, false)
-		font_bold:   fons.add_font_mem('sans', bytes_bold, false)
-		font_mono:   fons.add_font_mem('sans', bytes_mono, false)
-		font_italic: fons.add_font_mem('sans', bytes_italic, false)
+		font_normal: fons.add_font_mem('sans', bytes.clone(), false)
+		font_bold:   fons.add_font_mem('sans', bytes_bold.clone(), false)
+		font_mono:   fons.add_font_mem('sans', bytes_mono.clone(), false)
+		font_italic: fons.add_font_mem('sans', bytes_italic.clone(), false)
 		scale:       c.scale
 	}
 }
diff --git a/vlib/os/font/font.v b/vlib/os/font/font.v
index b7487e7875..e6f113e059 100644
--- a/vlib/os/font/font.v
+++ b/vlib/os/font/font.v
@@ -135,5 +135,5 @@ pub fn get_path_variant(font_path string, variant Variant) string {
 			}
 		}
 	}
-	return fpath + file + '.ttf'
+	return '${fpath}${file}.ttf'
 }
diff --git a/vlib/os/os.v b/vlib/os/os.v
index b298b99a91..8c30f9cfba 100644
--- a/vlib/os/os.v
+++ b/vlib/os/os.v
@@ -554,11 +554,16 @@ pub fn home_dir() string {
 // See also `home_dir()`.
 pub fn expand_tilde_to_home(path string) string {
 	if path == '~' {
-		return home_dir().trim_right(path_separator)
+		hdir := home_dir()
+		return hdir.trim_right(path_separator)
 	}
-	if path.starts_with('~' + path_separator) {
-		return path.replace_once('~' + path_separator, home_dir().trim_right(path_separator) +
-			path_separator)
+	source := '~' + path_separator
+	if path.starts_with(source) {
+		hdir := home_dir()
+		trimmed := hdir.trim_right(path_separator)
+		final := trimmed + path_separator
+		result := path.replace_once(source, final)
+		return result
 	}
 	return path
 }