fixup array and mvd sql docs (#14928)

docs/querying/sql-array-functions.md

@@ -56,8 +56,8 @@ The following table describes array functions. To learn more about array aggrega
 |`ARRAY_OVERLAP(arr1, arr2)`|Returns 1 if `arr1` and `arr2` have any elements in common, else 0.|
 |`ARRAY_OFFSET_OF(arr, expr)`|Returns the 0-based index of the first occurrence of `expr` in the array. If no matching elements exist in the array, returns `null` or `-1` if `druid.generic.useDefaultValueForNull=true` (legacy mode).|
 |`ARRAY_ORDINAL_OF(arr, expr)`|Returns the 1-based index of the first occurrence of `expr` in the array. If no matching elements exist in the array, returns `null` or `-1` if `druid.generic.useDefaultValueForNull=true` (legacy mode).|
-|`ARRAY_PREPEND(expr, arr)`|Prepends `expr` to `arr` at the beginning, the resulting array type determined by the type of `arr`.|
-|`ARRAY_APPEND(arr1, expr)`|Appends `expr` to `arr`, the resulting array type determined by the type of `arr1`.|
+|`ARRAY_PREPEND(expr, arr)`|Adds `expr` to the beginning of `arr`, the resulting array type determined by the type of `arr`.|
+|`ARRAY_APPEND(arr, expr)`|Appends `expr` to `arr`, the resulting array type determined by the type of `arr`.|
 |`ARRAY_CONCAT(arr1, arr2)`|Concatenates `arr2` to `arr1`. The resulting array type is determined by the type of `arr1`.|
 |`ARRAY_SLICE(arr, start, end)`|Returns the subarray of `arr` from the 0-based index `start` (inclusive) to `end` (exclusive). Returns `null`, if `start` is less than 0, greater than length of `arr`, or greater than `end`.|
 |`ARRAY_TO_STRING(arr, str)`|Joins all elements of `arr` by the delimiter specified by `str`.|

docs/querying/sql-multivalue-string-functions.md

@@ -57,8 +57,8 @@ All array references in the multi-value string function documentation can refer
 |`MV_OVERLAP(arr1, arr2)`|Returns 1 if `arr1` and `arr2` have any elements in common, else 0.|
 |`MV_OFFSET_OF(arr, expr)`|Returns the 0-based index of the first occurrence of `expr` in the array. If no matching elements exist in the array, returns `null` or -1 if `druid.generic.useDefaultValueForNull=true` (legacy mode).|
 |`MV_ORDINAL_OF(arr, expr)`|Returns the 1-based index of the first occurrence of `expr` in the array. If no matching elements exist in the array, returns `null` or `-1` if `druid.generic.useDefaultValueForNull=true` (legacy mode).|
-|`MV_PREPEND(expr, arr)`|Adds `expr` to `arr` at the beginning, the resulting array type determined by the type of the array.|
-|`MV_APPEND(arr1, expr)`|Appends `expr` to `arr`, the resulting array type determined by the type of the first array.|
+|`MV_PREPEND(expr, arr)`|Adds `expr` to the beginning of `arr`, the resulting array type determined by the type `arr`.|
+|`MV_APPEND(arr, expr)`|Appends `expr` to `arr`, the resulting array type determined by the type of `arr`.|
 |`MV_CONCAT(arr1, arr2)`|Concatenates `arr2` to `arr1`. The resulting array type is determined by the type of `arr1`.|
 |`MV_SLICE(arr, start, end)`|Returns the subarray of `arr` from the 0-based index start(inclusive) to end(exclusive), or `null`, if start is less than 0, greater than length of arr or greater than end.|
 |`MV_TO_STRING(arr, str)`|Joins all elements of `arr` by the delimiter specified by `str`.|