update help doc for --diff-style so it shows correct options

Author: joannecheng

CHANGELOG.md

@@ -9,6 +9,7 @@
 - Fix `kaocha.testable/test-seq` not respecting `:kaocha.testable/skip` on root testable
 - Fix `kaocha.testable/test-seq-with-skipped` omitting skipped tests on nested testables
 - `*.<ext>` will now match files with `.ext` extensions in any directory.
+- update help doc in cli runner: `--diff-style` should only show `:none` and `:minimal`
 
 ## Changed
 

src/kaocha/runner.clj

@@ -40,7 +40,7 @@
                     sym
                     (symbol "kaocha.report" s))))
     :assoc-fn accumulate]
-   [nil "--diff-style STYLE"    "The style of diff to print on failing tests, either :none or :deep"
+   [nil "--diff-style STYLE"    "The style of diff to print on failing tests, either :none or :minimal"
     :parse-fn parse-kw
     ]
    [nil "--plugin KEYWORD"      "Load the given plugin."