readme: add starred-block comment style, regen cmd help

Author: joshuasing

README.md

@@ -79,7 +79,7 @@ Flags:
   -c int
         display offending line with this many lines of context (default -1)
   -comment-style string
-        Comment style (line, block) (default "line")
+        Comment style (line, block, starred-block) (default "line")
   -copyright-header-matcher string
         Copyright header matcher regexp (used to detect existence of any copyright header) (default "(?i)copyright")
   -cpuprofile string
@@ -89,7 +89,7 @@ Flags:
   -diff
         with -fix, don't update the files, but print a unified diff
   -exclude string
-        Paths to exclude (doublestar or r!-prefixed regexp, comma-separated) (default "**/testdata/**")
+        Paths to exclude (doublestar or r!-prefixed regexp, comma-separated)
   -fix
         apply all suggested fixes
   -flags
@@ -190,8 +190,20 @@ a file. The current supported options are:
 
 golicenser supports configuring the comment type used for the license headers. The options are:
 
+
 - `line` - C-style line comments (`// test`).
-- `block` - C++-style block comments (`/* test */`)
+- `block` - C++-style block comments (`/* test */`). Example:
+```go
+/*
+test
+*/
+```
+- `starred-block` - Aligned, starred block comments. Example:
+```go
+/*
+ * test
+ */
+```
 
 ### Matchers
 

cmd/golicenser/golicenser.go

@@ -76,7 +76,7 @@ func init() {
 	flagSet.StringVar(&yearModeStr, "year-mode", golicenser.YearMode(0).String(),
 		"Year formatting mode (preserve, preserve-this-year-range, preserve-modified-range, this-year, last-modified, git-range, git-modified-years)")
 	flagSet.StringVar(&commentStyleStr, "comment-style", golicenser.CommentStyle(0).String(),
-		"Comment style (line, block)")
+		"Comment style (line, block, starred-block)")
 	flagSet.StringVar(&exclude, "exclude", "",
 		"Paths to exclude (doublestar or r!-prefixed regexp, comma-separated)")
 	flagSet.IntVar(&maxConcurrent, "max-concurrent", DefaultMaxConcurrent,