minor updates

doc/command-line.md

@@ -1150,8 +1150,7 @@ then the merged signature will have the sum of all abundances across
 the individual signatures.  The `--flatten` flag will override this
 behavior and allow merging of mixtures by removing all abundances.
 
-Note: `merge` only creates one output file, with one signature in it,
-in the JSON `.sig` format.
+Note: `merge` only creates one output file, with one signature in it.
 
 ### `sourmash signature rename` - rename a signature
 
@@ -1182,8 +1181,7 @@ will subtract all of the hashes in `file2.sig` and `file3.sig` from
 To use `subtract` on signatures calculated with
 `-p abund`, you must specify `--flatten`.
 
-Note: `subtract` only creates one output file, with one signature in it,
-in the JSON `.sig` format.
+Note: `subtract` only creates one output file, with one signature in it.
 
 ### `sourmash signature intersect` - intersect two (or more) signatures
 
@@ -1314,8 +1312,7 @@ sourmash signature import filename.msh.json -o imported.sig
 ```
 will import the contents of `filename.msh.json` into `imported.sig`.
 
-Note: `import` only creates one output file, with one signature in it,
-in the JSON `.sig` format.
+Note: `import` only creates one output file, with one signature in it.
 
 ### `sourmash signature export` - export signatures to mash.
 

src/sourmash/cli/sig/extract.py

@@ -33,7 +33,7 @@
 
 As of sourmash 4.2.0, `extract` also supports picklists, a feature by
 which you can select signatures based on values in a CSV file. See
-[Using picklists to subset large collections of signatures](#using-picklists-to-subset-large-collections-of-signatures), below.
+[the command line docs](https://sourmash.readthedocs.io/en/latest/command-line.html) for more information.
 
 """
 

src/sourmash/cli/sig/intersect.py

@@ -1,4 +1,4 @@
-"""intersect one or more signatures"""
+"""intersect two or more signatures"""
 
 usage="""
 
@@ -18,9 +18,6 @@
 in any signatures will be ignored and the output signature will have
 `track_abundance` turned off.
 
-Note: `intersect` only creates one output file, with one signature in it,
-in the JSON `.sig` format.
-
 """
 
 from sourmash.cli.utils import (add_moltype_args, add_ksize_arg,

src/sourmash/cli/sig/subtract.py

@@ -18,8 +18,7 @@
 To use `subtract` on signatures calculated with
 `-p abund`, you must specify `--flatten`.
 
-Note: `subtract` only creates one output file, with one signature in it,
-in the JSON `.sig` format.
+Note: `subtract` only creates one output file, with one signature in it.
 
 """