docs: wordsmith commands with column selector support

[skip ci]

src/cmd/geocode.rs

@@ -171,6 +171,8 @@ geocode arguments:
  For reverse, it must be a column using WGS 84 coordinates in
  "lat, long" or "(lat, long)" format.
  For countryinfo, it must be a column with a ISO 3166-1 alpha-2 country code.
+ Note that you can use column selector syntax to select the column, but only
+ the first column will be used. See `select --help` for more information.
 
  <location> The location to geocode for suggestnow, reversenow & countryinfonow subcommands.
  For suggestnow, its a City string pattern.

src/cmd/partition.rs

@@ -28,6 +28,10 @@ Usage:
 
 partition arguments:
  <column> The column to use as a key for partitioning.
+ You can use the `--select` option to select
+ the column by name or index, but only one
+ column can be used for partitioning.
+ See `select` command for more details.
  <outdir> The directory to write the output files to.
  <input> The CSV file to read from. If not specified, then
  the input will be read from stdin.

src/cmd/pseudo.rs

@@ -42,6 +42,13 @@ Usage:
  qsv pseudo [options] <column> [<input>]
  qsv pseudo --help
 
+pseudo arguments:
+ <column> The column to pseudonymise. You can use the `--select`
+ option to select the column by name or index.
+ See `select` command for more details.
+ <input> The CSV file to read from. If not specified, then
+ the input will be read from stdin.
+
 Common options:
  -h, --help Display this message
  --start <number> The starting number for the incremental identifier.

src/cmd/search.rs

@@ -1,7 +1,7 @@
 static USAGE: &str = r#"
 Filters CSV data by whether the given regex matches a row.
 
-The regex is applied to each field in each row, and if any field matches,
+The regex is applied to selected field in each row, and if any field matches,
 then the row is written to the output, and the number of matches to stderr.
 
 The columns to search can be limited with the '--select' flag (but the full row

src/cmd/select.rs

@@ -1,8 +1,8 @@
 static USAGE: &str = r#"
 Select columns from CSV data efficiently.
 
-This command lets you manipulate the columns in CSV data. You can re-order
-them, duplicate them or drop them. Columns can be referenced by index or by
+This command lets you manipulate the columns in CSV data. You can re-order,
+duplicate, reverse or drop them. Columns can be referenced by index or by
 name if there is a header row (duplicate column names can be disambiguated with
 more indexing). Column ranges can also be specified. Finally, columns can be
 selected using regular expressions.