diff --git a/docs/src/manpage.md b/docs/src/manpage.md
index bbb6447b1..e7cad2062 100644
--- a/docs/src/manpage.md
+++ b/docs/src/manpage.md
@@ -2170,7 +2170,7 @@ FUNCTIONS FOR FILTER/PUT
         (class=math #args=1) e**x - 1.
 
    flatten
-        (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map, and flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
+        (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map; flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
        Examples:
        flatten({"a":[1,2],"b":3}, ".") is {"a.1": 1, "a.2": 2, "b": 3}.
        flatten("a", ".", {"b": { "c": 4 }}) is {"a.b.c" : 4}.
diff --git a/docs/src/manpage.txt b/docs/src/manpage.txt
index c6fc7a2e6..880960425 100644
--- a/docs/src/manpage.txt
+++ b/docs/src/manpage.txt
@@ -2149,7 +2149,7 @@ FUNCTIONS FOR FILTER/PUT
         (class=math #args=1) e**x - 1.
 
    flatten
-        (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map, and flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
+        (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map; flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
        Examples:
        flatten({"a":[1,2],"b":3}, ".") is {"a.1": 1, "a.2": 2, "b": 3}.
        flatten("a", ".", {"b": { "c": 4 }}) is {"a.b.c" : 4}.
diff --git a/docs/src/reference-dsl-builtin-functions.md b/docs/src/reference-dsl-builtin-functions.md
index 533198b4f..f742523e0 100644
--- a/docs/src/reference-dsl-builtin-functions.md
+++ b/docs/src/reference-dsl-builtin-functions.md
@@ -392,7 +392,7 @@ depth  (class=collections #args=1) Prints maximum depth of map/array. Scalars ha
 
 ### flatten
 <pre class="pre-non-highlight-non-pair">
-flatten  (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map, and flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
+flatten  (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map; flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
 Examples:
 flatten({"a":[1,2],"b":3}, ".") is {"a.1": 1, "a.2": 2, "b": 3}.
 flatten("a", ".", {"b": { "c": 4 }}) is {"a.b.c" : 4}.
diff --git a/internal/pkg/dsl/cst/builtin_function_manager.go b/internal/pkg/dsl/cst/builtin_function_manager.go
index 407df3cdc..2bf4f087a 100644
--- a/internal/pkg/dsl/cst/builtin_function_manager.go
+++ b/internal/pkg/dsl/cst/builtin_function_manager.go
@@ -1600,7 +1600,7 @@ single-element arrays.`,
 			help: `Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures
 for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and
 the second argument is the flatten separator. With three arguments, the first argument is prefix,
-the second is the flatten separator, and the third argument is a map, and flatten($*, ".") is the
+the second is the flatten separator, and the third argument is a map; flatten($*, ".") is the
 same as flatten("", ".", $*).  See "Flatten/unflatten: converting between JSON and tabular formats"
 at ` + lib.DOC_URL + ` for more information.`,
 			examples: []string{
diff --git a/man/manpage.txt b/man/manpage.txt
index c6fc7a2e6..880960425 100644
--- a/man/manpage.txt
+++ b/man/manpage.txt
@@ -2149,7 +2149,7 @@ FUNCTIONS FOR FILTER/PUT
         (class=math #args=1) e**x - 1.
 
    flatten
-        (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map, and flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
+        (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map; flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
        Examples:
        flatten({"a":[1,2],"b":3}, ".") is {"a.1": 1, "a.2": 2, "b": 3}.
        flatten("a", ".", {"b": { "c": 4 }}) is {"a.b.c" : 4}.
diff --git a/man/mlr.1 b/man/mlr.1
index 19ed12520..39e84305e 100644
--- a/man/mlr.1
+++ b/man/mlr.1
@@ -2974,7 +2974,7 @@ Map example: every({"a": "foo", "b": "bar"}, func(k,v) {return $[k] == v})
 .RS 0
 .\}
 .nf
- (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map, and flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
+ (class=collections #args=2,3) Flattens multi-level maps to single-level ones. Useful for nested JSON-like structures for non-JSON file formats like CSV. With two arguments, the first argument is a map (maybe $*) and the second argument is the flatten separator. With three arguments, the first argument is prefix, the second is the flatten separator, and the third argument is a map; flatten($*, ".") is the same as flatten("", ".", $*). See "Flatten/unflatten: converting between JSON and tabular formats" at https://miller.readthedocs.io for more information.
 Examples:
 flatten({"a":[1,2],"b":3}, ".") is {"a.1": 1, "a.2": 2, "b": 3}.
 flatten("a", ".", {"b": { "c": 4 }}) is {"a.b.c" : 4}.