defining useful macros. Placing a <filename>.ghci</filename> file
in a directory with a Haskell project is a useful way to set
certain project-wide options so you don't have to type them
- everytime you start GHCi: eg. if your project uses GHC extensions
+ every time you start GHCi: eg. if your project uses GHC extensions
and CPP, and has source files in three subdirectories A, B and C,
you might put the following lines in
<filename>.ghci</filename>:</para>