default doc string wrapping to 160 chars

See #44 (comment).
Presently, in the pebble repository, there are violations of docstrings being
limited to 80 chars. This change updates the default to 160 chars to prevent CI
from failing.

main.go

@@ -37,7 +37,7 @@ import (
 
 var (
 	// TODO: wrap doc strings for imports and floating comments.
-	wrapdoc      = flag.Int("wrapdoc", 80, "column at which to wrap doc strings for functions, variables, constants, and types. ignores multiline comments denoted by /*")
+	wrapdoc      = flag.Int("wrapdoc", 160, "column at which to wrap doc strings for functions, variables, constants, and types. ignores multiline comments denoted by /*")
 	wrap         = flag.Int("wrap", 100, "column to wrap at")
 	tab          = flag.Int("tab", 2, "tab width for column calculations")
 	overwrite    = flag.Bool("w", false, "overwrite modified files")

main_test.go

@@ -31,6 +31,7 @@ func TestCheckPath(t *testing.T) {
 	*printDiff = false
 	*tab = 8
 	*groupImports = false
+	*wrapdoc = 80
 	files, err := filepath.Glob("testdata/*.in.go")
 	if err != nil {
 		t.Fatal(err)