trivial: fix then -> than typos in comments and documentation

- (better, more, bigger ...) then -> (...) than

Signed-off-by: Frederik Schwarzer <schwarzerf@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index b795a20..1c5afae 100644
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -105,7 +105,7 @@
  * Extracts ebp, esp and eip values understandable by gdb from the values
  * saved by switch_to.
  * thread.esp points to ebp. flags and ebp are pushed in switch_to hence esp
- * prior to entering switch_to is 8 greater then the value that is saved.
+ * prior to entering switch_to is 8 greater than the value that is saved.
  * If switch_to changes, change following code appropriately.
  */
 void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)