Correct spelling (#4152)

crates/nu-engine/src/evaluate/variables.rs

@@ -60,7 +60,7 @@ pub fn nu(scope: &Scope, ctx: &EvaluationContext) -> Result<Value, ShellError> {
     // std::env::vars(), rather than the case-sensitive Environment.GetEnvironmentVariables() of .NET that PowerShell
     // uses.
     //
-    // For now, we work around the discrepency as best we can by merging the two into what is shown to the user as the
+    // For now, we work around the discrepancy as best we can by merging the two into what is shown to the user as the
     // 'path' column of `$nu`
     let mut table = vec![];
     for v in env {

crates/nu-engine/src/shell/palette.rs

@@ -238,7 +238,7 @@ impl Default for Theme {
             variable: ThemeColor(Color::Purple),
             whitespace: ThemeColor(Color::White),
             word: ThemeColor(Color::Green),
-            // These should really be Syles and not colors
+            // These should really be Styles and not colors
             // leave this here for the next change to make
             // ThemeColor, ThemeStyle.
             // open_delimiter: ThemeColor(Color::White.normal()),

crates/nu-engine/src/types/deduction.rs

@@ -597,7 +597,7 @@ impl VarSyntaxShapeDeductor {
             }
             Expression::Table(header, _rows) => {
                 self.infer_shapes_in_table_header(header)?;
-                // Shapes within columns can be heterogenous as long as
+                // Shapes within columns can be heterogeneous as long as
                 // https://github.com/nushell/rfcs/pull/3
                 // didn't land
                 // self.infer_shapes_in_rows(_rows)?;