typo fix + expand
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129167 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/UsersManual.html b/docs/UsersManual.html
index c21a2b1..3636cdd 100644
--- a/docs/UsersManual.html
+++ b/docs/UsersManual.html
@@ -777,8 +777,8 @@
translated into a call to <tt>abort</tt>. If this option is set, then the code
generator will always lower the builtin to a call to the specified function
regardless of whether the target ISA has a trap instruction. This option is
-useful for environements (e.g. deeply embedded) where a trap cannot be properly
-handled.</dd>
+useful for environments (e.g. deeply embedded) where a trap cannot be properly
+handled, or when some custom behavior is desired.</dd>
</dl>
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