docs: fix PruningStatistics example and some typos (#3062)

datafusion/core/src/physical_optimizer/pruning.rs

@@ -63,7 +63,7 @@ use datafusion_physical_expr::create_physical_expr;
 ///
 /// ```text
 /// min_values("a") -> Some([5, Null, 20])
-/// max_values("a") -> Some([20, Null, 30])
+/// max_values("a") -> Some([10, Null, 30])
 /// min_values("X") -> None
 /// ```
 pub trait PruningStatistics {
@@ -116,7 +116,7 @@ impl PruningPredicate {
     ///
     /// The pruning predicate evaluates to TRUE or NULL
     /// if the filter predicate *might* evaluate to TRUE for at least
-    /// one row whose vaules fell within the min/max ranges (in other
+    /// one row whose values fell within the min/max ranges (in other
     /// words they might pass the predicate)
     ///
     /// For example, the filter expression `(column / 2) = 4` becomes
@@ -150,7 +150,7 @@ impl PruningPredicate {
         })
     }
 
-    /// For each set of statistics, evalates the pruning predicate
+    /// For each set of statistics, evaluates the pruning predicate
     /// and returns a `bool` with the following meaning for a
     /// all rows whose values match the statistics:
     ///
@@ -235,7 +235,7 @@ impl RequiredStatColumns {
         Self::default()
     }
 
-    /// Retur an iterator over items in columns (see doc on
+    /// Returns an iterator over items in columns (see doc on
     /// `self.columns` for details)
     fn iter(&self) -> impl Iterator<Item = &(Column, StatisticsType, Field)> {
         self.columns.iter()
@@ -259,7 +259,7 @@ impl RequiredStatColumns {
     ///
     /// for example, an expression like `col("foo") > 5`, when called
     /// with Max would result in an expression like `col("foo_max") >
-    /// 5` with the approprate entry noted in self.columns
+    /// 5` with the appropriate entry noted in self.columns
     fn stat_column_expr(
         &mut self,
         column: &Column,
@@ -780,7 +780,7 @@ fn build_statistics_expr(expr_builder: &mut PruningExpressionBuilder) -> Result<
             }
             // other expressions are not supported
             _ => return Err(DataFusionError::Plan(
-                "expressions other than (neq, eq, gt, gteq, lt, lteq) are not superted"
+                "expressions other than (neq, eq, gt, gteq, lt, lteq) are not supported"
                     .to_string(),
             )),
         };