Merge branch 'ch/clean-docfix' into seen

Typofix.

* ch/clean-docfix:
  git-clean doc: fix "without do cleaning" typo

Author: gitster

Documentation/git-clean.txt

@@ -127,7 +127,7 @@ ask each::
 
 quit::
 
-  This lets you quit without do cleaning.
+  This lets you quit without doing any cleaning.
 
 help::