Fix minor documentation errors

- git-ls-files.txt: typo in description of --ignored
- git-clean.txt: s/forceRequire/requireForce/

Signed-off-by: Michael Spang <mspang@uwaterloo.ca>
Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git-clean.txt

@@ -26,7 +26,7 @@ OPTIONS
 	Remove untracked directories in addition to untracked files.
 
 -f::
-	If the git configuration specifies clean.forceRequire as true,
+	If the git configuration specifies clean.requireForce as true,
 	git-clean will refuse to run unless given -f or -n.
 
 -n::

Documentation/git-ls-files.txt

@@ -42,8 +42,8 @@ OPTIONS
 	Show other files in the output
 
 -i|--ignored::
-	Show ignored files in the output
-	Note the this also reverses any exclude list present.
+	Show ignored files in the output.
+	Note that this also reverses any exclude list present.
 
 -s|--stage::
 	Show stage files in the output