document the different formatters

README.md

@@ -229,6 +229,63 @@ day in the computer's timezone. Add `Z` or an offset to specify the timezone.
 * `1h30m ago`
 * `two hours thirty minutes ago`
 
+## Default formatters
+
+Tiempo comes with a handful of formatters that display your entries in different
+ways. Here's the full list.
+
+### chart
+
+(New in 1.4.0) Displays a nice chart of the weekly progress.
+
+**Settings**
+
+By default this formatter will only display a nice chart of the progress divided
+by week and respecting the `week_start` setting. However you may specify a daily
+goal and a weekly goal to customize the chart, as well as how many minutes each
+character represents:
+
+In toml:
+
+```toml
+[formatters.chart]
+daily_goal_hours = 4
+weekly_goal_hours = 20
+character_equals_minutes = 30
+```
+
+In yaml:
+
+```yaml
+formatters:
+  chart:
+    daily_goal_hours: 4
+    weekly_goal_hours: 20
+    character_equals_minutes: 30
+```
+
+### text
+
+Displays nicely the entries grouped by sheet and day.
+
+### ical
+
+This formatter's output can be redirected to a file and then uploaded to a
+calendar app.
+
+### csv
+
+Basically dump the entries as CSV to stdout. Useful for passing entries to a
+different tool.
+
+### json
+
+Dump the entries in JSON format.
+
+### ids
+
+Dump only the ids in a single line
+
 ## Custom formatters
 
 You can implement your own formatters for all subcommands that display entries

src/main.rs

@@ -105,7 +105,7 @@ fn main() {
         .takes_value(true).value_name("FORMAT")
         .help(
             "The output format. Valid built-in formats are chart, text, ical, \
-            csv, json, ids. Documentation on defining custom formats can be \
+            csv, json and ids. Documentation on defining custom formats can be \
             found at https://gitlab.com/categulario/tiempo"
         );