patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/testdir/test_increment.vim b/src/testdir/test_increment.vim
index abd85be..1a631ec 100644
--- a/src/testdir/test_increment.vim
+++ b/src/testdir/test_increment.vim
@@ -284,7 +284,7 @@
 " 1
 "     1
 "     1
-"     Expexted:
+"     Expected:
 "     1) g Ctrl-A on block selected indented lines
 "     2
 " 1