diff --git a/parsing/src/parsing.rs b/parsing/src/parsing.rs
index 4bf17b9..6013ee2 100644
--- a/parsing/src/parsing.rs
+++ b/parsing/src/parsing.rs
@@ -41,14 +41,13 @@ impl BackingFunction {
 								.filter(|ele| ele != &"x")
 								.collect::<Vec<&String>>();
 
-							return Err(match var_names_not_x.len() {
-								1 => {
-									format!("Error: invalid variable: {}", var_names_not_x[0])
+							return Err(format!(
+								"Error: invalid variable{}",
+								match var_names_not_x.len() {
+									1 => String::from(": ") + var_names_not_x[0].as_str(),
+									_ => format!("s: {:?}", var_names_not_x),
 								}
-								_ => {
-									format!("Error: invalid variables: {:?}", var_names_not_x)
-								}
-							});
+							));
 						}
 					}
 				}
diff --git a/src/consts.rs b/src/consts.rs
index e96cba4..16fc6fb 100644
--- a/src/consts.rs
+++ b/src/consts.rs
@@ -92,4 +92,4 @@ lazy_static::lazy_static! {
 pub fn is_mobile() -> bool { return *IS_MOBILE; }
 
 #[cfg(not(target_arch = "wasm32"))]
-pub const fn is_mobile() -> bool { return false; }
+pub const fn is_mobile() -> bool { false }