kbuild: fix for some typos in Documentation/makefiles.txt

I noticed a few typos while reading makefiles.txt to learn about the
kbuild system.  Attached is a patch against 2.6.18 to fix them.
Remove trailing whitespace while we are there..
Signed-off-by: Bryce Harrington <bryce@osdl.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Documentation/kbuild/makefiles.txt

@@ -650,7 +650,7 @@ Both possibilities are described in the following.
 
 --- 4.7 Using hostprogs-$(CONFIG_FOO)
 
-	A typcal pattern in a Kbuild file looks like this:
+	A typical pattern in a Kbuild file looks like this:
 
 	Example:
 		#scripts/Makefile
@@ -682,7 +682,8 @@ When executing "make clean", the two files "devlist.h classlist.h" will
 be deleted. Kbuild will assume files to be in same relative directory as the
 Makefile except if an absolute path is specified (path starting with '/').
 
-To delete a directory hirachy use:
+To delete a directory hierarchy use:
+
 	Example:
 		#scripts/package/Makefile
 		clean-dirs := $(objtree)/debian/
@@ -926,7 +927,7 @@ When kbuild executes, the following steps are followed (roughly):
 		#arch/i386/Makefile
 		define archhelp
 		  echo  '* bzImage      - Image (arch/$(ARCH)/boot/bzImage)'
-		endef
+		endif
 
 	When make is executed without arguments, the first goal encountered
 	will be built. In the top level Makefile the first goal present
@@ -1070,7 +1071,7 @@ When kbuild executes, the following steps are followed (roughly):
 		#Makefile
 		export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 
-	The assigment to $(always) is used to tell kbuild to build the
+	The assignment to $(always) is used to tell kbuild to build the
 	target vmlinux.lds.
 	The assignment to $(CPPFLAGS_vmlinux.lds) tells kbuild to use the
 	specified options when building the target vmlinux.lds.
@@ -1180,3 +1181,5 @@ Language QA by Jan Engelhardt <jengelh@gmx.de>
 - Generating offset header files.
 - Add more variables to section 7?
 
+
+