Typos.

Cabal/doc/developing-packages.markdown

@@ -979,9 +979,9 @@ selected in each environment. This can be done with the `freeze` command:
 cabal freeze
 ~~~~~~~~~~~~~~~~
 
-The command writes the selected version for all depenencies to the
+The command writes the selected version for all dependencies to the
 `cabal.config` file.  All environments which share this file will use the
-depenency versions specified in it.
+dependency versions specified in it.
 
 ### Executables ###
 
@@ -1988,7 +1988,7 @@ can update the necessary fields programmatically instead of using the
 ## Conditional compilation ##
 
 Sometimes you want to write code that works with more than one version
-of a dependency.  You can specify a range of versions for the depenency
+of a dependency.  You can specify a range of versions for the dependency
 in the `build-depends`, but how do you then write the code that can use
 different versions of the API?
 

Cabal/doc/installing-packages.markdown

@@ -19,6 +19,10 @@ Alternatively, you can also use the `Setup.hs` or `Setup.lhs` script:
 
 For the summary of the command syntax, run:
 
+> `cabal help`
+
+or
+
 > `runhaskell Setup.hs --help`
 
 ## Building and installing a system package ##