docs(builtin): fix some missing lines (#24615)

These two functions seem to have previously had their docs start on the same
line as the signature, which I guess contributed to the lines being lost (though
I checked all other such functions from before again and these were the only
two).

1 files changed, 2 insertions, 0 deletions

diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index dc4f9610e0..99ea2920f7 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -3411,6 +3411,7 @@ id({expr})                                                                *id()*
 		reuse identifiers of the garbage-collected ones.
 
 indent({lnum})                                                        *indent()*
+		The result is a Number, which is indent of line {lnum} in the
 		current buffer.  The indent is counted in spaces, the value
 		of 'tabstop' is relevant.  {lnum} is used just like in
 		|getline()|.
@@ -3888,6 +3889,7 @@ keytrans({string})                                                  *keytrans()*
 <			<C-Home>
 
 len({expr})                                                         *len()* *E701*
+		The result is a Number, which is the length of the argument.
 		When {expr} is a String or a Number the length in bytes is
 		used, as with |strlen()|.
 		When {expr} is a |List| the number of items in the |List| is